IrfanView is a very fast, small, compact and innovative freeware (for non-commercial use) graphic viewer for Windows.
Zapper is free software developed to easily manage music tags for greater convenience.
Yacas (Yet Another Computer Algebra System) is a small and highly flexible general-purpose Computer Algebra System (CAS).
LPub3D is WYSIWYG editing application for creating LEGO style digital building instructions.
MeshLab, a mesh processing system, for user assisted editing, cleaning, filtering and rendering of large unstructured 3D triangular meshes (typical 3D scanning meshes).