For hackerschool application CracklePop Application. I wrote mine in JS and have it printing to console.
Assignment: Write a program that prints out the numbers 1 to 100 (inclusive). If the number is divisible by 3, print Crackle instead of the number. If it's divisible by 5, print Pop. If it's divisible by both 3 and 5, print CracklePop. You can use any language.