Epic Pen - A windows tool for drawing over your desktop and applications
XCodeClub.com - Rent your own private Virtual Mac with latest XCode.
gInk - An on-screen on-screen annotation software for Windows.
VirtualMacOSX.com - vmOSX -- is your affordable, Mac-based home on the web.
Gromit-MPX - Create annotations by directly drawing on your screen.
MacinCloud - MacinCloud is a Mac cloud platform that provides on-demand Mac cloud servers, flexible dev workload infrastructure and comprehensive Mac in the Cloud solutions