Numi

Numi calculator magically combines calculations and text, and allows you to share your computations with other users. Here's how it works. Type text, or simply paste it in. For example: 50 apps * $1.99 each + 3 apps * $4.99 + Photoshop for $600. Numi gracefully adds up all the numbers for you, and displays the result on the right-hand side. Of course, it can handle more complex math than the simple example.