https://github.com/tailhook/vagga
Major features:
- Running programs in linux containers (not a full virtualization like Vagrant)
- Fully userspace containers, no need for elevated privileges like for Docker
- Runs containerized process as a child of current shell, no attach/detach hell
- Images are automatically rebuilt and versioned
- Vagga has tools to manage trees of processes (so you run your redis-python-nginx server with one command)
- Compatibility with Vagrant-LXC and Docker