LanguageTool is an Open Source proofreading software for English, French, German, Polish, Romanian, and more than 20 other languages. It finds many errors that a simple spell checker cannot detect like mixing up there/their and it detects some grammar problems.

LicenseLGPL 2.1
Tagslanguage
HomePage https://www.languagetool.org 🔍 Inspect URL
Ranking#9046 in MvnRepository (See Top Artifacts)
Used By56 artifacts