I've written a number of enhancements over the years that have made it into various squeak versions.
I also wrote SVI, a squeak enhancement that adds some emacs and vim functionality to the squeak text pane.
I also wrote an EXIF 2.1 and TIFF 6.0 reader that worked in squeak 3.4. This work is not currently maintained, but was working pretty well in 3.4. Drop me an email if you want it updated (use the email indicated on the SVI page).
