A free program for Android, by Mobile Gyro.

If you love the classic word game, then Word Tile Solitaire is the game you’ve been waiting for! It’s time to challenge your mind and test your vocabulary. The classic gameplay and simple rules make this a fun and easy game to play. You don’t need any special skills, just good reflexes and the ability to quickly think and make decisions. The goal is to find the highest score by creating words from the letters that are randomly distributed on the board.

The game is free to play, but you can purchase in-app items with real money.