Monster Advancer is a compact suite of applications which allow for swift monster generation, advancement and customization, all within the context of 3rd edition(3.5) and Pathfinder. What once took up to an hour of dungeon masters’ time, now takes seconds. Large Fiendish, Half-Dragon Dire Wolves with 18 hit dice can now take their place of honor amongst the kraken and the hydra.
There are currently several applications worthy of note: There is a version made for massive customization (allowing templates, magical items and equipment , stat adjustments and feat selection), a version made for speed and simplicity, and another which can generate multiple creatures randomly based on the challenge rating or encounter level desired.
The entire project is completely free and available now. It is continuing to be enhanced daily with the ability to add class levels coming by the end of the week.
My goal is to help foster the 3.5 and Pathfinder communities by contributing to the tools that enhance the game by allowing time for creativity rather than crunching numbers.
monsteradvancer 
This would be brilliant as an app for android 🙂
I would pay for it. The Treasuregenerator especially.