GBase
GBase is a GTK program designed to convert between the four common bases used in programming (decimal, hexadecimal, octal and binary). It converts numbers on-the-fly as they are typed in. It can also convert numbers entered on the command line. It can correctly handle both signed and unsigned 32-bit integers.
This program was jointly developed with Kronos some time ago to help us while we were programming. It's been polished slightly since then and a few features added. Don't expect much from it, but if you want it, it's here.
Screenshot
Download
gbase-0.5.tar.gz