A real compiler and code editor in your pocket: write code on your phone, run it against your test cases, and see a verdict for every test with full stdout and stderr.
ScribbleMate is a fast, free infinite whiteboard for sketching, notes and diagrams — right in your browser. Draw with pen, marker, shapes and sticky notes on an endless zoomable canvas and export as PNG. No sign-up, the mobile app allows your mobile/tablet to be graphic tablet