The Only Sheet+ (TOS+) is a very powerful Character creation and maintenance workbook for both Dungeons & Dragons v3.5 and Pathfinder RPG rule systems. TOS+ is:
Easy to use: TOS+ presents printable sheets that are similar to the basic Character Sheet, so you quickly know where to find information you require. It also allows you to create a multi-class Character at the final level you need... No wasting time entering it level by level!
customizable: Any aspect of a Character can be customized. And with the power of excel behind it, TOS+ can handle special Characters as well!
Dynamic play: TOS+ can be used during a game session to apply effects on your character as you play. Check this video for a sample of Dynamic Play.
Stacking Rules: TOS+ has a complete implementation of the Stacking Rules, so you do not have to worry about various bonus stacking or not!