Wildcard - Discover, connect and meet people at communities
Lunchclub - Curated 1:1 professional connections
Shapr - A completely free way to build your professional network.
Serendipity - Serendipity is a PHP-powered weblog engine which gives the user an easy way to maintain a blog.
LetsLunch - Do more with your lunch hour. Meet new people.
Donut Slack Bot - Get matched with a new coffee buddy each week in Slack