Lunchclub - Curated 1:1 professional connections
Outdone - Special occasions are stressful.
Serendipity - Serendipity is a PHP-powered weblog engine which gives the user an easy way to maintain a blog.
GiftPicker by Presently - Buzzfeed quiz meets holiday shopping!
Founders Cafe - Co-work with Founders from Stanford, YC, Harvard
Lunch Roulette - Collaboration by grouping coworkers randomly for lunch.