Apple updated a Leopard web pages. Regarding Terminal,
The Terminal application in Leopard takes advantage of the operating system’s native text and graphics capabilities, using Input Manager and CoreText to fully support non-English languages. The updated layout engine provides very fast rendering of ASCII, ISO, and Unicode text, and a new user interface gives users around the world the ability to harness the power of UNIX. A simplified inspector and integrated settings pane make it easy to change the look and feel of Terminal.
The screenshot has tabs. Yey. Input Manager? We can’t find out the architecture of Input Manager in Leopard yet.
Also, on Ruby on Rails,
Leopard is also the premier platform for Ruby on Rails development, thanks to Rails, Mongrel, and Capistrano bundling.
Leopard comes with Ruby 1.8.6 and Python 2.5.