Helium - Helium lets you accept payments by credit card for anything you want to sell online.
Reddit List - Tracking the top 5000 subreddits
Product Hunt Shell - A geeky, web-based shell for browsing Product Hunt
Mailbrew - Automated email digests from Twitter, Reddit, YouTube & more
Screen Commander - Blank your screens at the click of your mouse.
Upvoted - A news publication by reddit