Did you know? Licenses for Open Source Software

We’ve discussed the many benefits of using Open Source Software (OSS) previously on this blog and in our landmark Open for business report, but we should also be mindful of the various implications and obligations imposed by OSS licenses.

• Copyleft– A play on the word “copyright”, it refers to the category of OSS licenses which require any modified or derivative works of the original to be licensed under the same license if distributed. It also requires the source code of the modified or derivative works to be made available. (e.g. GNU General Public License (GPL)) These licenses are said to be “viral”.

• Permissive – Permissive OSS licenses generally grant users the right to use, modify and distribute the OSS with only very simple obligations such as retaining all attribution notices and including a copy of the license with the distributed work. (e.g. Apache Software License)

Copyleft/GPL is one of the most popular OSS licenses and there is already a huge pool of codes released under GPL. Therefore when you release your software under GPL, you can easily find many available libraries and codes to use without worrying about the compatibility of the license with your chosen GPL license.

Permissive/Apache licenses are beneficial due to minimal restrictions. You are therefore able to attract both OSS developers and proprietary software developers to develop software released under the permissive license. Hence you can grow your community in a fast manner.

The license we’ve chosen for our ARIA Templates is the Apache License v2.0. The Apache License is a permissive license, and is very widely known and used in the software industry. It will also help us grow the developer community surrounding ARIA Templates.

We know that this can be a confusing topic – so be sure to let us know if you have any questions below!