Squeeze is a useful compression utility that can handle tarballs, zip, 7zip, and rar files and is developed as part of XFCE and can integrate into the Thunar file manager with the help of xfce4-archive-plugin.

Totem is a Gnome based application for playing multi media files. I have found that with the Xine engine and libdvdccss it works great for playing movie files and DVD’s (also use w64codecs or w32codecs for proprietary media).

gThumb is a nice image viewer which can be configured for slideshows and can interface with a digital camera. you can install a Thunar extention to display inline thumbnails.

GIMP is a sophisticated and powerful open source image manipulation program comparable to Adobe Photo Shop and the like.

Audacius is a classic winAMP like audio player. If you have ever used the classic oldschool winAMP then Audacious will feel like a glove.

If you have a large collection of mp3′s and want a simple, slim but robust audio player to manage your collection of music I recommend Exaile

I don’t like using any other Torrent program then Deluge. It has an extensive interface which allows for random ports and encrypted data stream. You can even indicate not to download files within a torrent and manage file priorities.

FileZilla is an open source ftp program for multiple platforms which is easy to use.

Catfish is a powerfull GUI to help you find any file or folder on your computer

gParted allows you to easily manage your partitions with a slick GUI using GTK.