Hotarubi no Mori e
Summer Wars
The Girl Who Leapt Through Time
Kotonoha no Niwa
A Letter to Momo
Clannad: After Story
Fuse: Teppou Musume no Torimonochou
Kaguya-hime no Monogatari (Yeah, it's a Studio Ghibli film, but it's fairly new)
These two are not very similar to Wolf Children, but they're worth watching.
Patema Inverted
Ghost in the Shell
Well...Others have already mentioned some great ones! Plz do watch those. I'll just add a bit more to that list -
=>Millennium actress (Heart wrenching but 1 of the most Beautiful love stories I have ever watched/read)
=>Gin-iro no kami no Agito (Unique, post appocalyptic setting)
=>Paprika (a Masterpiece!!)
=>5 cms per second (a movie purely & ONLY about unrequited love. not everyone's cup of tea though. I have seen a lot of people disliking it.)
=>Voice of a distant star (another heart wrenching story about tragic love by Makoto Shinkai with a mix of mecha, action, war, space in a futuristic setting)
=>Garden of Sinners movie series (Not only the whole series but, EACH & EVERY movei of this series is a separate masterpiece on it's own.)
I just finish "wolf children" movie and I want to know other movie like it, or good anime movie. I already saw every studio Ghibli and Satoshi Kon movies, so other suggestion please.