For a good Adwords Software use Speedppc.com. This is the best tool ever created for adwords, have fun!
SpeedPPC is expensive though. Yoiu had better have some deep pockets in order to make it worth your while (IMHO)
Start off with AdWords Editor... it's free and easy to use. Check out my AdWords Tutorial because I do it entirely with free tools! But I know you can do everything easier with and quicker with the paid tools (thought they cost a pretty penny, you make up for it the time you save).
Yes I also use Adwords Editore and Excel. If you are a Chinese, these two softwares are great because they both have Chinese version.