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
< Feedback on Manga Loader (unmaintained)
Should be fixed in the latest version.
Problems on Mangatraders.
The script doesn't seem to work on Mangatraders.