(portuguese dude here)
Love your icons, specially your icons for archivers (7z,Rar,Cab), but you've missed a few...
You've done one for ACE (not that used or known...) but none for ARC (freearc.org
), another multi-platform open source powerful archiver.
Would love that you would do a icon for that format. Will be using your icons across all my systems and on some clients as well as they are simple and easy to identify.