Recs.
Updated
SourceForge was for a long time, the de facto host for open source projects. Now it may have fallen a bit compared to the likes of GitHub and BitBucket, but it still hosts more than 400000 projects, 3.7 million registered users and has more than 4,800,000 downloads a day.
SpecsUpdate
Pros
Pro SourceForge offers a lot of helpful features for open source projects
Every project hosted on SourceForge can have discussion boards, and issue tracker, a tab for screenshots and something most code hosts don't have: a Shell access. Developers can also websites for their projects for free on SourceForge, as well as a Wiki for documentation.
Cons
Con Slow UI web interface
A simple text file or a mail list takes too long to load because of too much eye candy or CSS/html5 artifacts.
Recommendations
Comments
Flagged Pros + Cons
Con Untrusted by many people for serving malware
SourceForge was discovered to have been hijacking projects and bundling unrelated, third-party software and malware, causing many people to lose their trust of the website. SourceForge is even blacklisted by default in some popular ad blockers for this reason.