Here are three interesting pages on the bitcoin wiki:

P2SH votes - https://en.bitcoin.it/wiki/P2SH_Votes

Segwit support - https://en.bitcoin.it/wiki/Segwit_support

Covenant support - https://en.bitcoin.it/wiki/Covenants_support

All three gauge developer support for various fork proposals around at the time. Kind of like a vote.