Character Sheets
Character Sheet
5e Character Generator

Rules
5e SRD

Maps
RRPG Maps (pinterest)

Apps
Fantasy Grounds
Roll20
Online Dice Roller
Online Dice Roller (wizards)

Misc
5e notes and documents collection
3.5e Monster Finder
Ambient Sounds Online
Faerune Weather
Fantasy Name Genrator
Online Heraldry Generator
Spell Log/Reference