Insignia
Insignia is a project reviving online services for the original Xbox console.
guide not written yet
XLink Kai
A global gaming network that uses tunneling to enable online play for supported consoles.
guide not written yet
also on NSW · PSP · PS3 · Wii · PS2 · GAMECUBE · NDS · 3DS · PSVITA · Xbox 360
Parsec
A streaming platform that allows online multiplayer gaming by sharing a computer's screen.
guide not written yet
also on PSX · NSW · SNES · PS3 · Wii · GENESIS · PS2 · GBC · PS1 · ARCADE · NES · GAMECUBE · NDS · SATURN · 3DS · N64 · STEAM · GBA · Dreamcast · PC+
ZeroTier
A VPN service that enables multiplayer games over a virtual LAN.
guide not written yet
also on NSW · PSP · PS3 · Wii · PS2 · GAMECUBE · NDS · 3DS
Play it with people
Find people to play Xbox with
1 member here plays XBOX. Set up once, then the site tells you when they're on.
Nothing open right now. Open a lobby and the members who play it hear about it.