Number 1 looks Python frame and could be Herrett's (dark photo on my monitor, so tough to tell)
Number 2 looks like a Cobra and similar factory set
Number 3 looks like a Herrett's set not sure what for.
Number 4 don't have a clue
#1 are yet another cheap copy of Colt Target grips.
I don't know the maker, but I used to see them for sale as "Colt replacement grips".
A version with a thumb rest by the same maker is for sale on CDNN for $6.99
#3 are cheap versions of Herritt grips.
These were sold at CDNN, and I've seen them on sale for as little as $5.95.
The same grip with a tuumb rest is at CDNN now for $9.95.