my favorite is Kanata Kara
http://www.mangago.me/read-manga/kanata_kara/
but this is good also:
http://www.mangago.me/read-manga/anatolia_story/
http://www.mangago.me/read-manga/arata_kangatari/
http://www.mangago.me/read-manga/kyou_kara_maoh/
http://www.mangago.me/read-manga/tsubasa_reservoir_chronicles/
http://www.mangago.me/read-manga/tate_no_yuusha_no_nariagari/
http://www.mangago.me/read-manga/fushigi_yuugi/
http://www.mangago.me/read-manga/magic_knight_rayearth/
http://www.mangago.me/read-manga/silver_diamond/
These are more back in time than another world:
http://www.mangago.me/read-manga/threads_of_time/
http://www.mangago.me/read-manga/feng_yu_jiu_tian/
http://www.mangago.me/read-manga/sarasah/
http://www.mangago.me/read-manga/sengoku_strays/
Can anyone recommend me a manga about a main character that is randomly teleported to another world. I dont care about the genre as long as its not horror or mecha.