Magic Music Visuals - Fully-customizable and highly responsive visuals for live and recorded audio & MIDI.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
MilkDrop - 3D audio visualization plugin, compatible with WinAmp plugin API
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
projectM - projectM is an LGPL'ed reimplementation of Milkdrop under OpenGL.
LightShot - The fastest way to take a customizable screenshot.