enjoytheride.world – Education for Traders
Freecell.net is a well done version of freecell solitaire.
BoatloadPuzzles.com has loads of puzzles/games. Love the crosswords.
PuzzleChoice.com has a variety of puzzles to keep the mind sharp.
CouponFollow.com has lots of free brain-teasers, puzzles, riddles and illusions to keep your brain at peak performance. Even some for the kids!