Product Comparisons - Compare any 2 software products
Slack Overflow - A programmer's best friend, now in Slack.
TestBox - Test drive your software options before you buy
GitCommands - An interactive reference tool for Git commands
AlternativeTo - AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.
GitHub + Slack Integration - Full visibility into your GitHub projects right inside Slack