It's one .m file, with examples included.
It's fast, the title can be changed, it supports bars for nested loops, and the bar can be erased at the end.
The only problem is that you can't print anything while using this bar (this is true for all the text bar actually). Just print it before or after.
There are 5 examples, including one that shows how to print an estimate of the remaining time.
Any suggestions of improvements are welcome.