SpeQ Mathematics - SpeQ is a small, extensive mathematics program with a simple, intuitive interface.
Total Commander - A Shareware file manager for Windows® 95/98/ME/NT/2000/XP/Vista/7, and Windows® 3.1.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
Double Commander - Double Commander is a cross-platform open source file manager with two panels side by side.
NoteCalc - Browser-based notepad built for math calculations.
XYplorer - File Manager for Windows