PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
Helium - Helium lets you accept payments by credit card for anything you want to sell online.
LTspice - LTspice® is a high performance SPICE simulation software, schematic capture and waveform viewer with enhancements and models for easing the simulation of analog circuits.
X-Mouse Button Control - XMouse Button Control (XMBC) allows you to create application and window specific profiles.
Fritzing - Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to...