We have released DKPro Similarity 2.2.0 – a framework from the DKPro family for computing text similarity. It provides a general argumentation type system that has been used across several research projects within UKP.
DKPro Similarity is available under ASL and GPL at GitHub: https://github.com/dkpro/dkpro-similarity. It can be easily integrated to Maven projects, as it has been also deployed to the Maven Central repository.
For more details, visit the DKPro Similarity research page.