As you may know, Call of Duty: Black Ops 2 is set to feature point-based system for its Create-a-Class system. In previous Call of Duty titles, the perks and weapon mods you could select were limited to preset values, so it wasn't possible to roll a perk-heavy class by sacrificing your weapon.
With the introduction of a point-based system, you can now go armed to the teeth with a heavily modded weapon but be thin on perks, or choose from any variety of set ups to define your personal play style.
Although the game has yet to be released, how the new Create-a-Class system works has been heavily documented. As such, a DW24/7 staff member has put together a little app which works in both Google Docs and in Excel, allowing you to plan your loadouts for Black Ops 2 for when it comes out.
Here's an example(via reddit) of how it looks like:
