Coworker Coffee - Coffee with a different coworker each week
meshly - Tinder for nearby business opportunities
Serendipity - Serendipity is a PHP-powered weblog engine which gives the user an easy way to maintain a blog.
Webvizio - This free website feedback tool & website review software allows managers and teams to collaborate on website revisions in real time. Join for free now!
Twine - Twine is an open-source tool for telling interactive, nonlinear stories.
Collaboration by Instapage - Landing page design collaboration for marketing teams