Online Math Games (adults will enjoy as well)

Sudoku

Numbrix

Logic Puzzles

Misc Puzzles: sudoku, fill ins, crosswords, etc

Math is Fun - puzzles

Math is Fun - games

+plus magazine math games

Set

Bagels (multiple digits)

Mastermind

Web Games/ Brain Games

Consumer Math Games for Kids (thanks to Pierce for the suggestion!)

Christmas Coloring Pages

Math and Accounting Activities for Kids (Thanks to Megan for this link!)

Tangram Builder

Financial Planning Calculators and Tools (Thanks to Corrine for finding this site!)
       Includes math calculators, conversion calculators, and time/distance/weight calculators in addition to finance calculators.

Math Games and Consumer Math Skills (Thanks to Jenny for this suggestion)