The links to most useful and interesting free/opensource programs of January:
aTunes (audio player & manager, multiplatform)
Double driver (drivers backup and restore, for Windows)
Bullzip PDF printer (pdf producer, multilingual, for Windows)
KGB Archiver (powerful compressor, for Windows)
File Hamster (backup and files archive, for Windows)
KeyScrambler Personal (anti keylogging software, for Windows)
Returnil Virtual System 2008 (desktop virtualization system, for Windows)
WinRAR Unlock (allow to modify rar archives to let edit contents, for Windows)