I agree on trying to finish the project. A finished product can bring much comfort knowing a loved one made it.
As for small gifts - I would think something symbolic like a little crochet or knitted heart would be nice.
I found a link here http://planetmfiles.com/2010/01/26/free-crochet-heart-pattern/
and here http://mochimochiland.com/2007/02/free-pattern-hearts/
I am sorry for your loss. Good luck!