i just found a very interesting website (http://mapofcoins.com/) which has interesting information about forks from different cryptocurrencies.
the bitcoin fork map (http://mapofcoins.com/bitcoin) specially took my attention.

according to this site there has been 667 forks in total, 3 of which belong to this month alone.

you can click on the names of these coins and see the code and their website. a lot of them didn't even bother making more than 20 commits in years! or even change anything meaningful when they fork!