This repository contains all releases of FreeRTOS up to v10.0.1. I needed something like this for archaeological purposes, but couldn't find anything which covers the whole release history of the project.
The master branch only contains a cleaned export from the respective tarball
which only has the plain FreeRTOS sources. The full branch contains the whole
zip-file contents, but without the Demo directory, as this got really bloaty
in recent versions.
The commit timestamps correspond to the modification timestamps of the zip-files as received from SourceForge.