Palmetto
Palmetto is a quality measuring tool for topics
This is the implementation of coherence calculations for evaluating the quality of topics. If you want to learn more about coherence calculations and their meaning for topic evaluation, take a look at the project homepage - especially at the publications.
Palmetto from AKSW is licensed under a LGPL v3.0 License.
Please take a look at the the wikipage to read how Palmetto can be used.
If you are using Palmetto for an experiment or something similar that leads to a publication, please cite the paper "Exploring the Space of Topic Coherence Measures" that you can find on the project website. A link to the project website is welcome as well :)