Carbon - a simple PHP API extension for DateTime. Just everything you may need while working with dates in PHP.
PsySH - a runtime developer console, interactive debugger and REPL for PHP. Looks like the coolest dev tool after xDebug. But could not run debug correctly on basic Vagrant+Apache due to missing $HOME env param.
Carbon - a simple PHP API extension for DateTime. Just everything you may need while working with dates in PHP.
seenjs.io renders 3D scenes into SVG or Canvas. I am quite impressed with this demo
GestureKit SDK (JS) for creating and recognising gestures in mobile and web apps
Nice looking cross-platform MongoDB GUI client RoboMongo
Mailcatcher - runs a super simple SMTP server which catches any email message sent to it to display in a web interface.