Android apps for productivity

I’ve been exploring apps for my Android cellphone to increase my productivity. Here are the three apps I’ve added that look like they’ll work well for me:

• Business calendar
• Any.do
• Note Everything

Update 3/10/12: Once I learned Google Docs has mobile apps, it blows any other note-taking app out of the water. I still really like the simple interface of Any.do, and use it for my top priorities. However, I also use GTasks as a more detailed master list, which automatically syncs with Google Tasks.