FreePBX is a true Open Source development effort. Providing GNU GPL v2+ licensing (or equivalent) is all that is required to make a project Open Source. However, obtaining true community involvement is what makes a good project become great. This means transparent access to the project's activities and a development community with access to the project that is not limited to a sponsoring organization. These values are what fuel a really successful project.
The FreePBX Project uses the Atlassian JIRA application in order to tightly integrate the GIT Activity, Ticket system and Development Wiki. We have integrated this system with the main site so that you are signed on to both sites when you create an account and login to the system. Without an account, you will not be able to submit tickets but will have access to view everything.
The easiest way to get started is to simply take a look at our bug tracker. We have over 735 issues currently open for FreePBX alone.
Accessing The source
Please take a look at our development documentation for setting up a development environment here: Setting Up a Development Environment
Browsing The Source
You can take a quick look at the source here: http://code.freepbx.org/project/FREEPBX
FreePBX_phpinfo (release/13.0): format in to bootstrap divs
FreePBX_core (release/13.0): inbound routes twbsified
FreePBX_sipstation (feature/12.0/SIP-442): More changed to embed
FreePBX_sipsettings (release/12.0): vb
FreePBX_sipstation (feature/12.0/SIP-442): remove tabs from nokey view
Community Design and Development
In addition to taking input and feedback from the community at large, FreePBX tries to keep its design and road map plans transparent and accessible. This means ideas are discussed in the Forum, in the Wiki and in the #freepbx-dev IRC channel. Live interaction can also be extremely beneficial, so many phone conversations do take place (after all we are all about phones...). We try hard to document the content of these conversations into the Wiki to further benefit from community review and input.
The Development Wiki lists many ways to get involved. If you want to develop a good way to start is to contact one of the active developers. You can PM them, or you can get onto the Development IRC channel #freepbx-dev on Freenode and make contact.
We have recently transitioned to GIT which makes getting involved much easier. To assist in bug fixes and improvements you may fork one of the submodules on Github at https://github.com/FreePBX/ or https://github.com/FreePBX-ContributedModules. Once you have your code tested and working you can submit a pull request or submit a patch after you have fully completed our CSA on file. All bug fixes and feature requests should relate to a ticket at http://issues.freepbx.org. If you have written a module you would like included in our contributed repo (https://github.com/FreePBX-ContributedModules) simply create a repo for your module on Github then open a ticket in the bug tracker to make us aware of it and we can mirror your repo. Remember all code submissions through the bug tracker or through git require a CSA on file. If you are new to GIT please see our wiki for a general overview.
We are aware that there are parts of the code with some limitations today that you might run into. We will work with you on those.
Bug marshals and testing: As bugs get reported, it can be extremely helpful to have some testers who are able to review the bugs, confirm the issues, request additional information from the reporters and in general help us filter the bug reports and prioritize them. Get in touch with the core team if this is something you can help with.
Documentation, Documentation, Documentation
The more quality documentation that exists in a project, the more useful and valuable it becomes. This includes creating original content whether it be How-To Guides, Module Documentation or other forms. It also includes editing existing documentation for correctness and completeness and helping to get the site into a more standardized and organized form. If you have expertise in this area and would like to help drive it, please contact us.
Development Documentation is critical as well. If you are a developer, you probably know that this can be a weak point for many. There is a lot of information on the Development Wiki but it is also a priority of ours to put some effort into cleaning and updating the documentation, organizing it and augmenting it to make it easier for new developers to get involved.
A Note about Third Party Module Development