D&D 5e Basic Rules The official basic rules for D&D. A great place to start.
D&D 5e SRD System Reference Document containing all free to publish game rules
Unearthed Arcana Official suplements to D&D often containing new character options
5e Tools Easy to navigate collection of classes, feats, and races (including most Unearthed Arcana options). Other sections are less applicable to players.
/5eg/ Trove Mega upload almost all 5e content. Should only be used to get a digital copy of a book you already have *wink*
Character idea generator Quick and dirty character ideas
OMG! I'm going to have such an awesome map here.
If I can bring myself to do it, I'll keep a log of the party's adventures here.
All of the awesome player charcters (and maybe some non-player ones) will go here.