Ok, there are Lone wolf's one, Gazillions of excel ones (Although the
Alice40k ones and my one are some of the best), the
GW one (you have to write it in with pen, and it's not supported),
This army roster Although you need to sign in with an account.
This link Leads to another dakka page, where a member has created a better version of the
gw one. My favourite one is the
Battlescribe one. More or less a free version of army builder. There is one drawback though. There is no Data files that come with it. Either create your own or read about How to find them on their website.