A tiny x11 mouse wheel zoomer inspired by Boomer (https://github.com/tsoding/boomer) and xbindkeys. After the program starts it's invisible (has no window), but uses XGrabButton() to intercept mouse wheel + Mod4 (Windows key) events, which triggers a screen shot you can zoom into. While zooming you can pan with WASD/arrows and LMB, and return to normal with [ESC] or the other mouse buttons.
Run make (depends on cc, libx11, libXext, libGL).
See top of tsoomin.c for configuration options. You can override them like this:
CFLAGS="-DZOOM_SPEED=0.1 -DMOTION_BLUR_SPEED=0.1" make clean all
It works on my dwm setup, but I've seen it fail on awesomewm (it runs, but doesn't trigger on Mod4+wheel)