Donald Duck in Mathmagic Land
Spinning Levers - How a Motor Works
Things, a lot of them software, that I found interesting. Everything I link to is free/open source unless specified otherwise.
Makes working in vim nicer
set hlsearch " highlight all search results
set ignorecase " do case insensitive search
set incsearch " show incremental search results as you type
set number " display line number
set noswapfile " disable swapfile
IVS Edit has a free and pro version. The Free version is feature-rich and probably enough for most people.