Sourcegraph - Sourcegraph is a free, self-hosted code search and intelligence server that helps developers find, review, understand, and debug code. Use it with any Git code host for teams from 1 to 10,000+.

Akismet - Akismet is a spam fighting service that protects millions of WordPress sites from comment and contact form spam.

Atlassian Fisheye - With FishEye you can search code, visualize and report on activity and find for commits, files, revisions, or teammates across SVN, Git, Mercurial, CVS and Perforce.

ConvertKit - Email marketing software for online creators. We help you earn a living online through an intuitive email marketing automation tool.

Krugle - Krugle is the complete enterprise solution for search targeted to the development organization. 

AddToAny - Share buttons by AddToAny, the universal sharing platform for websites and apps.