Kasumi by Be: https://web.archive.org/web/20150415175316/https://mugenfreeforall.com/Warehouse/Ninja Masters/Kasumi.zip
Kasumi by Flam: https://mega.nz/file/JSt1DRab#O01elpqOrfdja-Hlsr8MPVydpLV5POTPMsUIWPzxsik
Ranmaru by Flam: https://mega.nz/file/0OEkyJZB#DGRae6KNG_HTHQPN6vTTnWZBKx9QF3kTfZJo6duHd7w
Tenho by Flam: https://mega.nz/file/oLFiwbQQ#8GWeWxVrev9Qw7BfJINBvkwVqMbtZU6cTzrKcLoyFtc
River by Juan Carlos: https://web.archive.org/web/20070209082159/http://eternal.mgbr.net/stages/river_stage.zip
Karasu stage by Lessard: https://mugenmultiverse.forumotion.com/t13661-ninja-masters-karasu-stage-by-lessard
Nobunaga stage by Kaine: https://mega.nz/file/calRRT7Y#rYAjjsN7a10VUEXeo2ZL2SkWbA_DruAFX63z8JLdP8k
Karasu stage by Charles_2011: https://mugenguild.com/forum/topics/sunset2019-191521.0.html
Ninja Masters 1.1 stages by Kasagi: https://tilde.town/~kasasagi/
Ninja Masters screenpack by Nobun: https://mega.nz/file/pSMhzIJB#aZpOa22QyRZYUHrMBO7VFO4MvDEzyr-9a_rTQQTX9nE
Endings by Kain the Supreme: https://web.archive.org/web/20040612122923/http://kainthesupreme.altervista.org:80/mugen/pges/addonsVari.htm
Missing stuff
Karasu by Yoyo
Natsume by The Impaler
Ninja Masters Screenpack by Claudio Toxi
Obs: Kain the Supreme never made Natsume and Karasu chars, he only made the endings. Hikaru Aotsuki & Bad Darkness are the same person.