If you're looking for anime similar to Infinite Stratos, you might like these titles. All recommendations are made by Anime-Planet users like you!
Since so few women are naturally born with the ability to become Pandoras and fight the extra dimensional aliens known as Nova, a program is approved by the Chevalier organization to allow any female to artificially become such a warrior. In order to test this new generation of E-Pandora, small groups of the highest ranked cadets from various Pandora academies around the globe are sent to Alaska in order to gauge the project's progress. Among those sent are Satellizer, Rana, and Kazuya since they display a skill level far above their position. It is not merely their combat prowess that is tested however, when the Evolution Pandora project does not go as expected.
Both these shows are fanservice vehicles for their cast of well endowed females. Both shows involve the girls all fighting, but Infinite Stratos uses mechs to fight.
Freezing is more explicit with actual nudity. If you're looking for some ecchi fanservice with minimal plot then these are the shows for you.
Sousuke Sagara is far from the average high school student - not only is he highly trained in military tactics, he puts his knowledge to use in every single applicable situation (and even those nonapplicable ones.) So, when confronted with high school, he tends to turn average high school experiences into off-the-wall adventures. Love letters become terrorist threats and field trips become commando operations; his survival depends on the watchful eye of his best friend and classmate, Kaname. Together, they may just make it out of high school alive...
In the "elemental fantasy" of Seirei Tsukai no Blade Dance, only a pure girl may enter into a spirit contract. At Areishia Spirit Academy, the daughters of nobility are assembled to take elite classes and become spirit elementalists. A boy named Kamito happened to be peeping on a student named Claire while she was taking a bath, and he accidentally makes a contract with a spirit instead of Claire. Now, Kamito has become something once thought impossible in this world — a male spirit elementalist.