canvas

Drawpile is a Free software collaborative drawing program that allows multiple users to sketch on the same canvas simultaneously.

modular audio visualisation powered by JavaScript

Resize, crop, shrink, flip, EXIF-autorotate, resample, convert, enhance, and process multiple pictures and photos with this professional software! 120+ Actions, 30+ Image Formats, 20 Scaling Modes, Conditional Processing based on Image Orientation.

Online collaborative whiteboard