1. Apache commons lang. http://commons.apache.org/proper/commons-lang/. Apache commons lang. http://commons.apache.org/proper/commons-lang/.
2. Asterisk-java. https://blogs.reucon.com/asterisk-java/. Asterisk-java. https://blogs.reucon.com/asterisk-java/.
3. Clover. https: //www.atlassian.com/software/clover/overview/. Clover. https: //www.atlassian.com/software/clover/overview/.
4. JavaParser. https://code.google.com/p/javaparser/. JavaParser. https://code.google.com/p/javaparser/.
5. JavaSlicer. https://www.st.cs.uni-saarland.de/javaslicer/. JavaSlicer. https://www.st.cs.uni-saarland.de/javaslicer/.