This project simply provides a p2 repository with the latest Acceleo 2.x ever released, version 2.8.0 (from 2011). It is available at https://dl.bintray.com/pcdavid/acceleo-2.x/2.8.0/.
The zipped version can still be obtained at from the official download area at OW2. This project simply published the actual repo in a way that can be consumed by downstream builds, in particular for Sirius Kit.