Installing Acceleo with the update site
The update site is the best way to install Acceleo. This update site makes it easier to stay up to date.
Start Eclipse, choose Help -> Software Updates -> Find and Install...
Choose search for new features to install.. then click on Next.
You can now see the list of update sites defined within your Eclipse installation.
We will now add Acceleo's one. Click on New Remote Site... and fill the dialog box as in the screenshot.
When it's done, click on Finish.
Then the wizard will ask you what feature you want to add. Tick "Acceleo" then click on Finish. Eclipse will then download the Acceleo plugins and restart.