The Simplebet was invented by Kim Godgul in 2008 as a simple alternative alphabet for writing English. The letters only have one case and the shapes are simpler than the Latin ones.
More information about Kim Godgul's alphabets (in Korean)
If you need to type in many different languages, the Q International Keyboard can help. It enables you to type almost any language that uses the Latin, Cyrillic or Greek alphabets, and is free.