suprails and rg: Two Rails Application Generators
Most Rails developers are familiar with the repetitive grunt work between running the rails command and starting in on custom code: adding plugins, setting up git, initializing Capistrano, bringing in your usual custom rakefile, and so on. There are projects that provide a "Rails-plus" starter application with common stuff baked in (like Bort), but if you use one of those you're limited to what the developer thought you should add, unless you start fixing up the source code yourself.
Two new projects, suprails and rg, take a different approach to Rails application generating. They're both template-driven application generators that take a configuration file describing what you want to build and then go build it. Either one can make a new Rails application, bring in plugins, set up a git repository, run generators, and so on. The idea is that you set up your configuration once, and then just generate applications from it.
Suprails uses plain text files with a list of commands for its templates. The syntax for rg templates is more ruby-ish, with a template class containing nested tasks. Both projects are in the early days yet, but either one will already help you get rid of the repetitive work if you create many Rails applications.