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    neogabo, Welcome to the XOOPS forum.
Sure, we can always use an helping hand. 
It depends also a bit on your qualifications, PHP, CSS, Javascript, ... or what you like to do.
There is no such thing as a todo list but:
As always there are some 
bugs to tackle.
There are some little projects as the 
image manager.
Helping people with their 
old modules (move to PHP5).
At Babylon, there are some 
modules to test.
If you are good in documenting (writing documentation that is), then there are some articles etc to write for WiKi, FAQ, etc
Ways enough to keep busy!