Sleazy Fork is available in English.
Gallery index/search: Improves appearance/layout, parses and cleans up titles. Can hide/fade galleries by tag (requires flagging perk). Can resort gallery thumbs which is useful when hiding. Gallery view: Can adjust thumb sizes to make neat rows (requires large thumb perk). General: Option for grey color scheme by rewriting css (might have a few issues). Settings panel pops out on the left on mouseover on pages where it works.
Broken
The highlighter is broken and the script doesn't work on g.e-hentai.org at all.