Greenshot – Snagit Replacement for make a screenshot on Windows. Rich feature more than the default snippet tool from Windows. You can select Filename output and can push directly to Dropbox or some 3rd party application.

Shutter – Screenshot replacement for Ubuntu for make screenshot. Rich feature also. But totally, I just want to create screenshot as a file. That’s all.
KeycastOW – So, this is a tool to display the keyboard stroke on Windows platform. I like it the most top more than other tool such Displayer. Free license from Brook Hong
CHDK — a canon hack development kit. Enhance the camcorder to do more thing. I use it to continue record when file is reach 4GB or 30 minutes where usually it will stop the video record. There are some more feature such HDR, show Memory / Battery in Percent, Timelapse and much more.