pathfinder

I tab back and forth between One Note, which holds my notes; a browser on Archives of Nethys, and Pathbuilder 2e's "Encounters" feature.

Pathbuilder Encounters is probably not the best most full-featured encounter management tool out there, but it automatically syncs with my players' Pathbuilder characters, which I find brilliant because I can see all their stats and character sheets. Lets me see the difficulty of encounters as I add monsters, as well as automatically roll all their initiatives, manage HP, etc.

Biggest negatives are that there's no way to enter custom or third-party monsters (at least that I know of), and that changing initiative order (e.g. when knocked unconscious) is an awkward manual process.