If you're looking for anime similar to Full Metal Panic!, you might like these titles. All recommendations are made by Anime-Planet users like you!
The year is 1969 and alien invaders are trying to dominate the world. The only hope for Earth is AEGIS, a group of teenagers with the special ability to open 'Gates' that let them harness elemental powers gated from another dimension. AEGIS must now seek out other gatekeepers in order to stand a chance against the destruction of the world.
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...
After years apart, childhood friends Isamu Dyson and Guld Bowman reunite as rival pilots, each showcasing an experimental plane for the military. But their mutual love for longtime friend Myung threatens to spin their already tense feelings out of control! Now, each battles to secure Myung's affections, but even more dangerous than their own dark secrets is a clandestine plot involving superstar singer Sharon Apple that threatens all of humanity!
"Labors" are large construction robots that are now being used to commit crimes. To meet the challenge, Special Vehicle (SV) units are established by the Tokyo PD. However, the Second SV unit is a total joke. Determined to change this, Izumi and Shinohara become pilots of the new Ingram 98 police labors, and are determined to change that reputation, with the help of the SV-2 gang of misfits.
These are both mecha animes in what i would call a fairly realistic future sci fi type (sorry to raxephon and evangelion, but they are a little more farfetched) The mecha scenes just seem so believable (except for that damn giant red one in fmp... but i guess it's ok too) additionally the military organization and police force setting is quite similar, though you get more frequent escapes to school in fmp.
In the distant future many things have changed. Worlds are colonized and people travel the stars freely. The GOTT (Galactic Organization of Trades and Tarifs) exists to maintain order and peace along the galaxies. Enter two ES members. Eclair and Lumiere. They are sent on missions to keep the universal peace, under the flag of GOTT. But soon they come to realize that there is more going on behind the scenes than they previously imagined...
Especially the 2nd half of Full Metal Panic is recommended if you like Kiddy Grade and want to watch something else (or the other way around). Since at that point, the action and comedy are at the same lev3l. Full Metal Panic is somewhat more hilareous than Kiddy Grade and has a romance aspect instead of a drama aspect. So if you like some more comedy and more mecha, check out Full metal Panic. If you like space and a heavier drama, go for Kiddy Grade