Kakooma is a fun resource by Greg Tang to help strengthen math facts and build math fact fluency.
Grand Prix Multiplication is a math game that allows students to race against others while practicing their multiplication facts. It is a fun way to not only practice accuracy of their math facts, but the speed of recall as well.
Multiplication Blocks is a game within Math Playground where students work to identify factors of the target number (product).
XtraMath is designed for students to strengthen their recall of math facts and build math fact fluency.