I have hacked some specification files together in order to support Tcl syntax highlighting, code folding and identiication of procedures in Xcode. It’s a rough and dirty implementation, but always something to start from. Look at the Development/Mac section here.

Adaptation of gdirs for the bash shell. Keep track of your directory stack and use both command line and finder windows to explore them. The details are here.

I am a long-time exmh user, even on Mac OSX now. But from time to time I want to open a message in Apple's Mail.app. Here is an applescript and instructions to achieve this.

I documented the steps needed to compile ParaView 3 from source on Mac OSX, enabling MPI. More info here.