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
Doesn't seem to work on Batoto anymore
Is it just me or it doesn't work for batoto anymore?
Update: I got wrong, it didn't work because the one I was reading was separated by charapters, not pages.