Recently I came across a project called Conkie. The Linux users among you may be familiar with the software that inspired it, Conky, a widget framework for displaying information from various plugin modules to your desktop. These modules usually display system stats like CPU temperature, HDD usage, and network transfers, but are highly customizable to display pretty much any kind of information you want.
Conkie is still a relatively new project (not yet a year old) and still a work-in-progress. The creator, Matt Carter, seems to be working on this pretty much solo and is on the lookout for contributors, so this could be a great opportunity to dip your toe into open-source if you haven’t already. As well as help making Conkie work on Mac and Windows systems, Matt is also after some design help, so there is scope to get involved no matter where your skills lie.