These are 3 ZnT fanfics made by jayb and there all so good!
Here is the link: http://www.fanfiction.net/u/804252/jayb
The 3 Stories are: (The stories are in order so read them 1 by 1)
1. Zero no Tsukaima The Award
2. Zero no Tsukaima The Mission
3. Zero no Tsukaima Welcome Home
These three are the best Zero no Tsukaima fanfics that I have read (not that there are alot of ZnT fics...) and I'm sure thet all you ZnT fans will enjoy them too!!