Registry CheckUp 2.2
Registry CheckUp is a program that thoroughly scans your Registry, hunting down and identifying all types of problems.
Evaluation period: 30 days.
A free open-source alternative to the Microsoft Office suite. Comprises Writer (word processor), Calc (lets you create tables), Impress (a tool for creating multimedia presentations), Draw (vector graphics editor), Math (equation editor). All the above applications can work with MS Office documents as well.
A Linux-like environment for Windows. It consists of two parts: a DLL (cygwin1.dll) which acts as a Linux API emulation layer providing substantial Linux API functionality; a collection of tools, which provide Linux look and feel.
Note: "Download" links to the Cygwin installer.