Ohloh – the open source network
Ohloh is an open source network where you can compare open source projects, contribute and search for similar software.
It’s works as a wiki, everyone can edit a page. If you join Ohloh you can add a new project and make corrections in existing projects. Ohloh doesn’t host projects and code, but you can analyze code’s history and ongoing updates.
Are you curious? There is a profile for Ubuntu with some information about the project: http://www.ohloh.net/p/ubuntu
For example, you need to choose a CMS to create a blog and nowadays there are many options like WordPress, Joomla, Drupal and more. On Ohloh, you can compare these projects and analyze them against a lot of information.
When you are thinking about choosing a software for your project you probably want a solution with high activity, many contributors and get to know license information. All of this information is shown in Ohloh in a simple web page.
See below some comparisons between similar projects:
Now you can use Ohloh to compare or find out similar projects