Heroku buildpack: redis
This is a Heroku buildpack for adding redis to your application.
Testing
heroku build -b .
Multipacks
More likely, you'll want to use it as part of a larger project, which needs to use redis. The easiest way to do this is with a multipack, where this is just one of the buildpacks you'll be working with.
$ cat .buildpacks
git://github.com/heroku/heroku-buildpack-ruby.git
git://github.com/dz0ny/heroku-buildpack-redis.git
$ heroku config:add BUILDPACK_URL=git://github.com/ddollar/heroku-buildpack-multi.git
This will bundle redis into your instance without impacting your existing system.