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'Hallo Northern Sky' or HNSKY is a full feature planetarium program for Windows. The program controls your telescope via the ASCOM interface, has a comprehensive up to date deep sky database with 30.000 objects and detailed descriptions, a star database with millions of stars and hundreds of Deep Sky Survey images which blends in accurately.
Download HNSKY

AstroTortilla is a helper application that brings plate solving to your astrophotography workflow. With plate solving, AstroTortilla can on its own figure out where your telescope is pointed. This enables you to automatically and quickly do things like: calibrate your GoTo tracking mount, GoTo any target with arcsecond accuracy and measure your polar alignment error.
Download AstroTortilla

Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope. It is being used in planetarium projectors. Just set your coordinates and go. Features: Realistic simulation of the sky, sunrise and sunset; Default catalogue of over 600,000 stars; Downloadable additional catalogues for up to 210 million stars; Catalog data for all New General Catalogue (NGC) objects; Images of almost all Messier objects and the Milky Way; Artistic illustrations for all 88 modern constellations; More than a dozen different cultures with their constellations; Solar and lunar eclipse simulation; ...
Download Stellarium


The first edition of Googol+ was launched in 2007, but we posted it in another website. Seven years later Googol+ is still the only genuine Arbitrary Precision Windows Calculator you can find. Now, we decided to deeply revamp this product and add 64-bit processing power if you have a 64-bit operating system (Googol+, 64-bit edition is a few times faster in lengthy tasks, like factoring).
Download Googol+

You can use Calculator to perform simple calculations such as addition, subtraction, multiplication, division and percentage. You can perform calculations by clicking the calculator buttons, or you can type calculations by using your keyboard. You can also use the numeric keypad to type numbers and operators by pressing Num Lock.
Download Calculator

Precise Calculator
With Precision Calculator you can adjust the precision of your desired operation (for example to 1000 digits). Precision Calculator knows all usual mathematical functions, prime numbers, statistical functions, complex numbers, PI, matrices, integral and it is programmable (commands if, goto, print, return, ...).
Download Precise Calculator


OnlyStopWatch is a desktop stopwatch with milliseconds precision. Small size, fully portable. OnlyStopWatch does not have to be installed and can be executed easily from the desktop, and can be carried on a small usb-stick or other memory device.
Download OnlyStopWatch


GEDCOM Validator
GEDCOM Validator is a tool for checking a GEDCOM file for problems which could lead to data loss when transferring files between different genealogy applications. Lots of genealogy products claim support for GEDCOM but often there are differences in the way each creates GEDCOM files. This means it is more important than ever for developers and users to be able to check GEDCOM files adhere to the specifications correctly. Now with GEDCOM Validator, you can check your files for problems and get in depth help on fixing any issues reported.
Download GEDCOM Validator

Every person has their own story but they are also part of a collective family history. Gramps gives you the ability to record the many details of an individual's life as well as the complex relationships between various people, places and events. All of your research is kept organized, searchable and as precise as you need it to be. Gramps supports the GEDCOM standard, allows fine grained privacy controls and can generate many different types of reports (descendant trees, graphs, connection diagrams, ...)
Download Gramps

My Family Tree
My Family Tree is a genealogy product for all keen family historians. Its modern user interface and wide range of features will help you create your family tree in no time at all.
- Interactive and customisable family tree chart viewer.
- Add photos, videos and attachments to each family members.
- Record facts and events with evidence explained citations for each person.
- Trace your family movements using the map viewer.
- View all family events in a detailed interactive timeline.
- Analyse family statistics on births, deaths, marriages and more.
- Print and share your family tree.
- Create web reports to put on your website.
- Relationship, phonetics and date calculators.
- Get hands on with full support for touch screen devices.
- Protect your data with a password and privacy controls.
- Backup your family history data to USB or portable hard drive.
- Support for the GEDCOM 5.5 and 5.5.1 specifications.
Download My Family Tree


QGIS is a user friendly Open Source Geographic Information System (GIS) licensed under the GNU General Public License. QGIS provides a continously growing number of capabilities provided by core functions and plugins. You can visualize, manage, edit, analyse data, and compose printable maps.
Download QGIS

SAGA (System for Automated Geoscientific Analyses) is a Geographic Information System (GIS) software with immense capabilities for geodata processing and analysis. SAGA is programmed in the object oriented C++ language and supports the implementation of new functions with a very effective Application Programming Interface (API). Functions are organised as modules in framework independent Module Libraries and can be accessed via SAGA’s Graphical User Interface (GUI) or various scripting environments (shell scripts, Python, R, ...).
Download SAGA

GeographicLib is a small set of C++ classes for performing conversions between geographic, UTM, UPS, MGRS, geocentric, and local cartesian coordinates, for gravity (e.g., EGM2008), geoid height, and geomagnetic field (e.g., WMM2010) calculations, and for solving geodesic problems. (The library may be used from .NET applications using the NETGeographicLib wrapper library.) It is a suitable replacement for the core functionality provided by geotrans.
Download GeographicLib

Marble is a virtual globe and world atlas - your swiss army knife for maps. Find your way and explore the world! Use Marble similar to a desktop globe; pan around and measure distances. At closer scale it becomes a world atlas, while OpenStreetMap takes you to street level. Search for places of interest, view Wikipedia articles, create routes by drag and drop and so much more.
Download Marble


MyTourbook is a software to visualize and analyze tours which are recorded by a GPS device, bike- or exercise computer and ergo meter. Features: Import, receive, export, edit and visualize tours; Show photos; Analyse heart rate; Compare tours automatically; Segment a tour automatically; Statistical analysis; Manage tours for different people; Tour Segmenter; ...
Download MyTourbook

GPXSee is a Qt based tool for visualizing and analyzing GPX files. Features: User-definable map sources; Elevation/speed/heart rate graphs; Support for POI files; Support for multiple tracks in one view; Export to PDF; Native GUI for Windows, Mac OS X and Linux.
Download GPXSee

GPS Reviser
GPS Reviser analyzes and changes GPS coordinates and time in digital pictures. Features: Add or change GPS-coordinates of digital images; Add or change GPS-Time; Add missing coordinates half-automatic; Find files in a directory with suspicious GPS-Data; Rename files using indices, where files are sorted by GPS-Time; Create and print list with names of places, as they are presented by Google Maps; ...
Download GPS Reviser

This software is designed to facilitate the hobby of launching and tracking down weather balloons by the plotting of a GPS's location on Google Earth, via the NMEA format. As a bonus this software will predict an airborne balloon payload using U.S. weather sounding data and take many variables into account. GPSPS also allows multiple plots may be active at once, as well as input and output via Network and Serial Port protocols.
Download GPSPS

Traccar is an open source GPS tracking system for various GPS tracking devices. System supports more than 80 different communication protocols from popular vendors. It includes web interface to manage tracking devices online. Release versions include latest Traccar (Server) and Traccar Web (Web Interface for Traccar Server) builds.
Download Traccar

RouteConverter displays, modifies and converts GPS data between over 70 formats. It works without installation, automatically detects the format of a file, supports drag and drop, offers a map view onto the positions of routes, tracks and waypoints, allows to modify positions in the map view. RouteConverter supports multiple routes within Google Earth, GPX and Garmin MapSource files, allows to select duplicate positions to remove them to abbreviate tracks, allows to move one or more positions of the route to the top, to the bottom, upwards and downwards.
Download RouteConverter

QtVlm is routing software for virtual and real sailing boats.
QtVlm can be used in two modes:
- Virtual Racing designed to manage and pilot virtual boats from Virtual 'loup de mer' VLM virtual races.
- Real Boats connected (or not) to a GPS device.
QtVlm uses boat polar diagrams and grab weather files, and includes Routing module (isochrones method). Route module respectively allowing route optimization and waypoints management.
Download qtVLM


Lingoes is a dictionary and multi-language translation software providing results in over 80 languages. It offers full text translation, capture word on screen, translate selected text and pronouncing text, and abundant free dictionaries as a new gerenation dictionary and translation software. Lingoes offers users the instantest way to look up dictionaries and translation among English, French, German, Spanish, Italian, Russian, Chinese, Japanese, Korean, Swedish, Thai, Turkish, Vietnamese, Greek, Polish, Arabic, Hebrew and more over 80 languages.
Download Lingoes

Transcription Aid
This software is to help type in text from speech recordings. It has several functions proven to help this type of work. However it is fully manual (aside from auto-completion), so no speech recognition if you are looking for that, but it is a great tool to do the job.
Download Transcription Aid

Praat is a scientific software program for the analysis of speech in phonetics. Praat analyzes mono signals. But within certain limits, stereo signals can be recorded and saved, opened, and played back in stereo. The modest support for stereo signals that Praat does provide is there for the convenience of colleagues who have their speech material in stereo form. In fact, outside the lab, it is almost impossible nowadays to produce mono tape recordings with standard equipment and standard connecting cables. Most portable recorders record in stereo nowadays.
Download Praat

Longman English Dictionary Browser
Longman English Dictionary Browser is a small application that allows you to quickly search and view word definitions from the Longman Online English Dictionary.
First, launch the program and it will stay in the task tray. Next, select a keyword to look up and press 'Control + Shift + d' keys. The program will search the definition and show the result.
Download Longman English Dictionary Browser

Polyglot 3000
Polyglot 3000 is an automatic language identifier that quickly recognizes the language of any text, phrase or even single words.
- Recognizes more than 400 languages.
- Supports Unicode texts.
- Convenient user interface.
- True-Coloured icons in menu and toolbar.
- Quick and correct language identification.
- Can be set to only check for popular languages.
- Multilingual interface (English, German, French, Spanish and others).
Download Polyglot 3000


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Unit Conversion

Converber is a unit converter. It is a powerful software utility that will help make easy conversions between 1324 various units of measure in 38 categories.
Download Converber


RW Trainer
RW Trainer is a bilingual (English and Spanish) Windows application that allows skydivers to design, optimize, animate and print sequential relative work jumps. A 'must have' for serious Formation Skydiving competitors, very useful also for judges, FAI rules designers or just beginner relative workers.
Download RW Trainer

PreviSat is a simple, fast and intuitive application that displays the position of artificial satellites. Its graphical interface is designed to meet the needs of the neophyte or experienced observer. Developed in C++/Qt, it can work on all platforms and makes fast and precise calculations. PreviSat can calculate all passes of artificial satellites for any location in the world. So you can observe passes of the ISS (International Space Station) or Iridium flares, even if you live in a city.
Download PreviSat

GoldenCheetah is a software package that:
- Downloads ride data directly from the CycleOps PowerTap and the SRM PowerControl V, VI and VII.
- Imports ride data downloaded with other programs, including TrainingPeaks WKO+ and the manufacturers' software for the Ergomo, Garmin, Polar, PowerTap, and SRM devices.
- Provides a rich set of analysis tools, including a critical power graph, BikeScore calculation, histogram analysis, a best interval finder, and a pedal force versus pedal velocity chart, to name just a few.
Download GoldenCheetah

KMLCSV Converter
KMLCSV Converter is a free open source software that enables you to convert KML file to a formatted CSV file, and vice versa. This CSV file can then be uploaded into your Garmin GPS by using Garmin POI Loader, which can be downloaded for free. This allows you to easily plot all custom point of interests (POI) through Google Earth or Google Maps first before transferring them into your Garmin GPS. You can also use KMLCSV Converter to visually map your iPhone or iPad tracking data into Google Earth.
Download KMLCSV Converter

Prog Finder
Prog Finder - Ex. Prog Satellite Finder. Simple and completely free the utility capable considerably to help with adjustment of the Satellite dish or Terristeral antenna.
- Calculation of azimuth and elevation angle.
- Indication of level of a signal, including the sound.
- Chart of signal level.
- Scanner and power satellite detection.
- Control of Diseq positioner (include usals), switch,...
- Support Terrisateral and Satellite signal.
Download Prog Finder