VulnerableCode by nexB was a project that I was particularly interested to contribute to. VulnerableCode is a free and open database of FOSS software package vulnerabilities and the tools to create and keep the data current.

I worked on adding support for Openstack advisories to the project.
The process involved scraping different webpages listed and extract advisories alongwith their respective versions.
The draft PR can be found here
https://github.com/nexB/vulnerablecode/pull/391