7-Zip, believe that a lot of people heard of it, but few of us really used, just because we are accustomed to the most common WinRAR and the once - great WinZIP. Anyway, 7-Zip is the one which currently has a extremely high compression ratio archiver (developed by Igor Pavlov from Russia), this also is the most important technical characteristics measure for such applications. In addition, 7-Zip releases based under GNU LGPL , so it is open source and free.

Notepad++ (also called Notepad plus plus) is a very distinctive open-source pure text editor. Its function is much stronger than the Windows built-in Notepad editor, besides can be used to make a general pure text file, it is also suitable to write computer programs for programmers as a source code editor.

Launchy is a free, open-source Windows desktop enhancement tool, it can arrange a strong "Run" bar on your desktop, you can start the computer program, file, folder and bookmark simply by way of entering some keywords, very fresh and very smart!

FastCopy claiming to be the fastest file copy/delete software on Windows platforms, due to its powerful and superior performance, it is beyond almost all the other similar tools in a very period of time.

Miranda IM (short for Miranda Instant Message), an instant messenger designed only for Windows system, which is open source, supporting multiple protocol and customizable for many plugins, with very little system resources occupation.