DrawPile - Drawpile is a drawing program that lets you share the canvas with other users in real time.
Numi App - Numi is a beautiful text calculator for Mac.
PaintTool SAI - Learn to draw in different ways.
SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .
Excalidraw - Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.