XSD Diagram is an open source viewer. It depends on the Microsoft .net framework 2.0. The Linux port it runs under Mono. It has a similar capability like Altova’s XML Spy to navigate and display XML tree structures.
JMH is a Java harness for building, running, and analysing nano/micro/milli/macro benchmarks written in Java and other languages targeting the JVM.
Atlas is a wiki-like, git-managed authoring platform for creating books. http://chimera.labs.oreilly.com/books/1230000000065/ch01.html
apt-get remove allows to uninstall software packages for Debian and Ubuntu. Some software may still have configuration stored on your system. If you don’t have used
apt-get purge, the config files still resides on your Debian installation. This post illustrates how to remove these packages.