Projects for which the source code is distributed under one of the many open source licences. Open source projects may be used and shared freely but typically you must distribute the software under same terms.
Popularity Contest is a WordPress widget for displaying the most popular posts on a blog sidebar. The project is hosted on the Wordpress development site.
TimeTag is an open source time series database implemented from the ground up for Windows PowerShell. If you want to know more about TimeTag, please visit the dedicated TimeTag project website.