Greasy Fork is available in English.
Support for over 70 sites! Loads manga chapter into one page in a long strip format, supports switching chapters, minimal script with no dependencies, easy to implement new sites, loads quickly and works on mobile devices through bookmarklet
< Opiniones de Manga Loader (unmaintained)
Added to the pending list. I'll get to these soon.
[Request] Add Site
http://www.yomanga.co
http://www.senmanga.com (not the raw version)