With ConvertAll, you can convert any unit in the large database to any other compatible unit. If you want to convert from inches per decade, that's fine. Or from meter-pounds. Or from cubic nautical miles. The units don't have to make sense to anyone else.

GTick is an acoustical and graphical metronome application (usually used to support musicians at practising an instrument). It features a scale from 30 to 250 beats per minute and 2/4, 3/4, 4/4 and other meters. You need a sound device for using it.

GDB is a source-level debugger, capable of breaking programs at any specific line, displaying variable values, and determining where errors occurred. Currently, gdb supports C, C++, D, Objective-C, Fortran, Java, OpenCL C, Pascal, assembly, Modula-2, Go, and Ada. A must-have for any serious programmer.

Battery Monitor is a battery monitor for laptops. It displays the current status of the battery (charge/discharge and energy level) as well as some information about the general health of the cell.

KGeography is an aid for learning about world geography. You can use it to explore a map, show information about regions and features, and play quiz games to test your geography knowledge.