The 'Officially Supported' and 'Contributed' FreeRTOS Code page provides a more detailed explanation of the differences between officially supported and contributed FreeRTOS ports.
Contributed files vary in their content. Some contain all the files required to execute a demo, while others contain files that must be added to the directory structure contained in the official FreeRTOS .zip file download. Also some contributions are based on historic versions of FreeRTOS while others use more recent versions. In most cases the version of FreeRTOS used in a community contributed project can be easily updated by obtaining the latest files from the FreeRTOS/Source directory of the main FreeRTOS download. I would encourage anybody downloading a contributed file to also download the latest official FreeRTOS release.
Some .zip files contain copies of the lwIP TCP/IP stack which is licensed separately from FreeRTOS. The lwIP license can be viewed here.
Please note that Amazon Web Services Inc. cannot be held responsible for the contents of any user contributed files, neither can we support them. Please report anything that is included in this section that you think should be removed. Also please be aware that OpenRTOS commercial licenses cannot be provided for community contributions.
The Community Contribution forums are located here.