Usually the dot card system of teaching is recommended for under-2s as (as far as I understand it) the ability to perceive quantity diminishes after that age. There have been many good things said for the Jones Geniuses maths course, and I intend to use it with my son, which is intended for older toddlers (2+) but I can't make recommendations yet, as we are still using dot cards.
For foreign languages, I love Muzzy and Little Pim. Muzzy is a little outdated graphics-wise but is still entertaining. My son loves watching Pim in Chinese.
For Spanish and French there is also a flashcard system called babybit which is similar to the Wink to Learn program.
Hope this helps!