http://rpgtinker.com/ Tool for combat NPC Generation.
http://donjon.bin.sh/5e/ A lot of handy tools, including dungeon generator, encounter generator, loot generator, magic shop generator etc.
http://www.5esrd.com/ 5e SRD wiki
Ascendant campaigns can view previous versions of their pages, see what has changed (and who did it), and even restore old versions. It's like having a rewind button for your campaign.
We've already been saving your edits, so if you
you will have instant access to your previous versions. Plus, you get a 15-day free trial, so there's nothing to lose.