Most of Apugli's content will be moved to Apoli as of 1.21.1. I'll be writing up a basic primer for migration from Apugli at some point, but either way, I hope to retire from Origins development.
Apugli is an addon to Apoli that adds new power types, conditions and actions to Apoli for datapackers/addon devs to work with if the mod is installed on the client and the server.
Apoli is the library mod Origins (for 1.17 and above) uses for its powers, conditions and actions. Apugli should work right out the bat with any mod that has Apoli or Apoli by itself.
The 1.16.5 versions are meant for Origins 0.7.3
Origins Power Expansion is a discontinued mod. All of its content has been ported to Apugli, any OPE dependent datapacks should work right out the bat. In other words, Apugli is a continuation of OPE.
This mod is built into TooManyOrigins or CursedOrigins if:
TooManyOrigins (Fabric) - 0.1.3a or later
TooManyOrigins (Forge 1.16.5) - 0.5.1.1-0.5.1.2 | Unsupported
TooManyOrigins (Forge 1.19.2 and above) - 0.8.0 or later
CursedOrigins - 2.0.0 or later | Unsupported
