Time Travel:
http://www.mangago.me/read-manga/orange_takano_ichigo/
http://www.mangago.me/read-manga/boku_dake_ga_inai_machi/
http://www.mangago.me/read-manga/girls_go_around/
http://www.mangago.me/read-manga/black_outsider/
http://www.mangago.me/read-manga/nemureru_tsuki/
Reincarnation:
http://www.mangago.me/read-manga/ng_life/
http://www.mangago.me/read-manga/bokura_no_kiseki/
http://www.mangago.me/read-manga/saiyaku_wa_boku_o_suki_sugiru/
http://www.mangago.me/read-manga/ouji_to_majou_to_himegimi_to/
http://www.mangago.me/read-manga/uragiri_wa_boku_no_namae_wo_shitteiru/
http://www.mangago.me/read-manga/oyayubihime_infinity/
http://www.mangago.me/read-manga/strawberry_combat/
You may have probably read this one already but this a reincarnation one SAIYAKU WA BOKU O SUKI SUGIRU
Time travel yaoi. http://www.mangago.me/read-manga/itsuka_koi_ga_kanau_made/
reincarnation: http://www.mangago.me/read-manga/replay/
http://www.mangago.me/read-manga/e_heibon_desu_yo/
http://www.mangago.me/read-manga/tales_of_demons_and_gods/
http://www.mangago.me/read-manga/the_reincarnated_one_doesnt_want_to_cheat/
http://www.mangago.me/read-manga/isekai_de_kuro_no_iyashi_te_tte_yobarete_imasu/
http://www.mangago.me/read-manga/kumo_desu_ga_nani_ka/
http://www.mangago.me/read-manga/ascendance_of_a_bookworm/
http://www.mangago.me/read-manga/koushaku_reijou_no_tashinami/
http://www.mangago.me/read-manga/fenglin_tianxia_wangfei_shisansui/
Genwaku no kudou. It included reincarnation, time travel, soul possesion.
I wanna read a manga about reincarnation, soul possession or time travel. Anything along those lines also it can be from any genre. Already read the one about the slime and Feng Yu Jiu Tian as well as Not Equals. Plzzzzzz and thank you!~