D&D Beyond

From the site introduction: Your Digital D&D Source Dungeons & Dragons Fifth Edition Tools, Rules, Races, Classes, Items, Spells, Monsters, and More User summary: This is an "official" web portal to a variety of game-specific tools and an extensive user forum. Use requires a free account. The rollout of complete functionality is planned through three "Beta Phases": Phase 1 - Compendium, Listings, and Forums (available) Phase 2 - Character Builder and Character Sheet Phase 3 - Homebrew Integration and Campaign Management