tODE - the Object-centric Development Environment. Smalltalk. development, deconstructed and a development environment for GemStone/S. Part of the GsDevKit tool set.
See the GsDevKit_home project for tODE and GemStone/S 64 installation instructions.
Here's a video of my Smalltalks 2013 presentation tODE: And Now For Something Completely Different.
Smalltalks 2015: Announcing GsDevKit_home And tODE (video, slides)
Here's a recent screen shot:
Here are some posts from Stephen Ramsay that explain why I added command-line support to tODE (Stephen just says it better than i):