Was just browsing and came across this website screencast-o-matic.com that allows creating screen cast from web without any installation.
I decided to check this website. And here’s the result.
The video demonstrates calling fortran from c. The fortran is compiled with gfortran and C with Gcc.
Why did I choose this example? Well these two programs were lying around on my netbook’s desktop.
The service is great. It loads a java program and the intuitive GUI is easy to use. Easy upload to YouTube from within the app is topper. ;)