Looks like The Foundry has begun a new initiative to ‘crowdsource’ some of their support functions with a website called ‘Nukepedia’.  Collecting scripts, plugins, sample footage, and more, it’s a one-stop website for all things Nuke. In addition, they have feature articles and interview with industry big-names, such as this one with Bill Spitzak, where they discuss Nuke’s history with the FLTK library:

Nuke 2 used Mark Overmars’ Forms library, written for Irix GL. I had to rewrite this to use OpenGL and at the same time this was happening Linux started to be used and we realized that OpenGL was much too slow to use as the main interface (pretty much the opposite as today!) so the toolkit had to be rewritten to use X for all the non-3D parts. Since this was changing everything anyway, I thought changing the api to C++ and making widgets that matched our actual usage would be a good idea, and this is where FLTK came from.
Wook, who was managing software at that time, gave me permission to release FLTK as open source, and it was therefore available just as open source took off. Open source was a big win, in particular we got, for free, a port to Windows.

(Nuke is QT now).  The site still looks pretty young, but does have a nice selection of Python scripts available for download.

Nukepedia – Resources, tutorials and all things Nuke.