DrCrypt, based on basic xor(exclusive or) encryption which is designed to be fast and reliable. Also DrCrypt supports 3 platform.(Java, .NET, Win32)
VERISIL - Secure Data Deletion Technology And Library ® is perfectly developed and open source secure data removal library. The name of project is Turkish (means "CLEAN DATA"). VERISIL is developed in delphi, compatible with Lazarus & FreePascal.