I want to keep downtimed as simple as possible: it should do only a single thing and do it well. And that is keeping track of the downtimes. uptimed has a lot of bloat which does not belong to downtimed. uptimed seems targeted for Linux where as downtimed is supposed to run on any (UNIXish) popular server platform. Anyone is free to merge the functionality in to updowntimed (or whatever) as both are free software.
Hi this looks similar to uptimed (http://freshmeat.net/projects/uptimed) perhaps the feature sets could be merged.
An open, cross-platform journaling program.
A scientific plotting package.