robotpkg is a source-based package manager (based on BSD's pkgsrc) and focused on robotic softwares. It is developed at LAAS-CNRS.
It currently packages a subset of ROS Indigo (mostly packages meant to be run on the robots, not so much desktop packages). You can check the full list of available packages.
It also offers pre-compiled binary packages for selected platforms.
robotpkg installation only requires git + standard build tools. It should not take more than 5 minutes.
Once installed, you can download, compile and install ROS with a simple:
$ cd robotpkg/meta-pkgs/ros-robot $ make update