TMSC 
TMSC (Topics Modeling on Source Code) is a command line application to discover the topics of a repository the user provides. A "topic" is a set of keywords, in this case source code identifiers, which typically occur together. This project has nothing to do with GitHub topics.
$ tmsc https://github.com/apache/spark
...
Parallel and distributed processing - General IT 4.43
Machine Learning, sklearn-like APIs - General IT 3.87
Java/JS + async + JSON serialization - General IT 3.58
Java string input/output - Programming languages 3.29
Cryptography: libraries - General IT 3.23
SQL, working with databases - General IT 3.11
Java: Spring, Hibernate - Technologies 3.09
Operations on numbers - General IT 2.98
Distributed clusters - General IT 2.62
Functional programming, Scala - Programming languages 2.60
Automatic topic inference can be useful for cataloging repositories or mining concepts from them. The current model was trained on GitHub repositories cloned in October 2016 after de-fuzzy-forking. There is a paper on it.
Installation
pip3 install tmsc
Usage
Command line:
$ tmsc https://github.com/apache/spark
Python API:
import tmsc
engine = tmsc.Topics()
print(engine.query("https://github.com/apache/spark"))Docker image
docker build -t srcd/tmsc
docker run -d --privileged -p 9432:9432 --name bblfshd bblfsh/bblfshd
docker exec -it bblfshd bblfshctl driver install --recommended
docker run -it --rm srcd/tmsc https://github.com/apache/spark
In order to cache the downloaded models:
docker run -it --rm -v /path/to/cache/on/host:/root srcd/tmsc https://github.com/apache/spark
Contributions
...are welcome! See CONTRIBUTING and code of conduct.