Grab screen areas and note it with a mouse, pen & keyboad quickly.
Especially for learners watching some lectures online or using video capturing devices. Grab screen areas with a click (or tap), automatically save it and allows adding notes on it using mouse, pen and keyboard - very quick (and draft). Then it is possible to view grabbed screenshots and annotate it additionally with the same set of tools, easy and convenient. May be help to somebody these sad days.
Rassam-paint is an opensource bitmap editing and drawing with the
following advanced features :Free Selection Tool,Zoom ,Undo,Text Tool,Color
palettes,Dynamic resize image,Pencil ,Lines, Rectangles , Color Picker,
Round Brush , Flood Fill , Rectangle,Filters,And more... Rassam-paint support popular graphics image formats (PNG, JPEG, TIFF, BMP and others).
Burn is a small and compact 32x32 256 color image (sprite) editor for Dos (or POSIX, using Dosbox or Dosemu). It currently contains several gfx-effects than can be applied to images, animation features and a tiny scripting language (amongst others).
SImg is astronomical image processing software for Linux. Some of the features are deconvolution (various algorithms), removing interferences, automatic shifting of images, computation of PSF and and a visualization tool.