I’ve created an initial page to hold a repository of Roll20 PowerCards macros, in the hopes of collecting and sharing the best ones created by myself and the community. the new page if available from the top navigation here : http://www.twentysidedblog.com/roll20-powercards-library/
Initially I’ve only got a couple of macros that I use form some of my players in-game for D&D 5E (I rely on PCMHelper for almost everything), but This will be updated to include new macros and hopefully new games over time.