btex - interactively compile LaTeX to PDF or PS or DVI, highlighting warnings and errors ( https://github.com/ppurka/btex )
searchforfile - search for files interactively with results "as-you-type" ( https://github.com/ppurka/searchforfile )
displaymessage - wrapper around a bunch of gui dialogs ( https://github.com/ppurka/displaymessage )
A couple more in my GitHub account.