I need some ideas for some programs to make. Im unsure on what to make.

I currently have made and released the following programs.

Magic 8Ball (easy, but actually extremely popular)
Link Back Verifier (enter sites and sites taht link to your site to check if they linking back to you)
Mouse Track (tracks how far your mouse has traveled in inches , miles)
Account Manager (Stores account types, login and password for different type of accounts)
A Phone book
Pong
Tic Tac Toe
Tile Merger (merges 2 tiles together)
Siphon Anime Lister (enter your anime list into a custom database and displays it has a html file)


Anyone got any good suggestions for some programs or even games.