I 've written 3 scripts:
Geom Tool : it makes geometric operations (intersection, projection …).
Mesh Copy/Paste : you can copy a part of a mesh, and paste it later (even in another Blender instance).
UV Tool: tools to manage UV (super weld, distribute).
The documentation page for the scripts is:
I have tested on Linux and WinXP, with Blender 2.42 and Python 2.4 (complete installation of Python seems not necessary).
I hope that they will be useful to someone.
Have a good day !