Organizing tasks into tags
The
Tag ToDo List app for
Android, as the name says, allows organizing the tasks into tags (just as you organize files in folders). Basically each tag is a separate todo list. As you can see below, you can have a tag for personal tasks, one for school (or work) and one for friends related tasks:

It's important to know that you can add, rename and delete tags at will, by using the menu. When you have selected the tag you want to change (through the upper spinner), just click the Menu button on your phone: