I'm bored.

Word games

• Bracket City: Daily game. Easier to play than explain.
• Sporcle Daily Acrostic: Daily game.
• Raddle: Daily game. The tutorial explains it better than I can.

Trivia games

• Sporcle: Just in case you haven't heard of it.
• Thrice: Fun daily trivia game.
• QB Reader: Play quizbowl!
• Catfishing: Daily game. Guess Wikipedia articles from their category lists.

Logic games

• Simon Tatham's Portable Puzzle Collection: A bunch of puzzle games. Some of my favorites are Map, Mines, Net, Rectangles, Singles, and Untangle.
• Puzzle Team: Some overlap with Simon Tatham's, but also has some fun ones like Star Battle.
• Buzzled: Fun daily logic puzzle game.
• Every 5x6 Nonogram: I think this is technically an MMO?

More games

• Redactle: Daily game. Guess a Wikipedia article word-by-word.
• Immaculate Grid: Daily game. I only occasionally play the baseball flavor of this one, and I'm pretty bad at it.
• Enclose.horse: Daily game where you enclose a horse. (The tutorial explains it better than I can.) Very cute design, which masks how challenging the puzzles can be.
• NandGame: Build a computer from scratch.
• 100 Jumps: Self-explanatory.
• List Animals Until Failure: Self-explanatory.
• Back of Your Hand: How well do you know your neighborhood?
• The Wiki Game: Click from one random Wikipedia article to another.