Apps similar to RePen include EpicPencil, which is free. Other options are ZoomIt, Epic Pen, gInk and Screen Marker and Recorder. There's no shortage of Digital Painting Tools like RePen, with more than 25 alternatives for Mac, Windows and Linux.
Draw Over It gives presenters, trainers, and any professional an always-ready overlay for live markups. Open it with a hotkey, sketch directly on top of any app, and jump back to work without leaving a trace.
Poland
EU
Lightweight screen annotation tool for Windows. Draw on your screen over any application with fading ink, spotlight mode, laser pointer, and shapes. Perfect for presentations, teaching, and streaming.
A live screen effect layer for macOS that adds real-time zoom, cursor spotlight/highlight, and freehand drawing directly on your screen.
A neat little application that allows you to draw on your screen. Use it from anywhere you want - be it your desktop, while browsing internet or even while in a video game.
LatviaEU
DemoPro is a simple and unobtrusive screen annotation tool for the Mac ideal for live demonstrations. Just press a customizable hotkey to draw on the screen. Release it to continue your demonstration. DemoPro also includes a countdown timer.
MouseKit turns your mouse cursor into a presentation, on-screen drawing, and cursor-tracking tool — all in one, for Windows.
Serbia
bananotate is a powerful application that allows you to edit and annotate your screen live. Zoom in, highlight, draw shapes, add text, capture your screen, create mock UI, and much more.
