Apache OpenOffice

Apache OpenOffice (AOO) is an open-source office productivity software suite. It is one of the successor projects of OpenOffice.org and the designated successor of IBM Lotus Symphony. It is a close co...
Language(s): C++, Java
Operating system(s): Linux, Mac OS, Windows
License: Apache License 2.0

Apache Spark

Apache Spark is an open-source cluster-computing framework. Spark provides an interface for programming entire clusters with implicit data parallelism and fault tolerance. Apache Spark achieves hig...
Language(s): Scala, Java, Python, R, SQL
Operating system(s): Microsoft Windows, Mac OS, Linux
License: Apache License 2.0

Ardour

Record, Edit, and Mix on Linux, macOS and Windows. Ardour's core user group: people who want to record, edit, mix and master audio and MIDI projects. When you need complete control over your tools...
Language(s): C++ (with a little C and assembler thrown in where it makes sense)
Operating system(s): Linux, Mac OS, Window
License: GNU General Public License v2

Avidemux

Avidemux is a free video editor designed for simple cutting, filtering and encoding tasks. It supports many file types, including AVI, DVD compatible MPEG files, MP4 and ASF, using a variety of codecs...
Language(s): C++
Operating system(s): Windows, OS X, Linux, BSD
License: GNU General Public License

Avogadro

Avogadro is an advanced molecule editor and visualizer designed for cross-platform use in computational chemistry, molecular modeling, bioinformatics, materials science, and related areas. It offers f...
Language(s): C++, Qt
Operating system(s): Linux, macOS, Unix, Windows
License: Public domain, GPL v2