Since 2005. I have been one of the chief developers of the open-source software suite Babel, which includes among other components Fluid Construction Grammar, a special programming language for developing computational construction grammars. I have also created the first prototype of the FCG Editor, a free Integrated Development Environment for FCG, which you can learn more about here.
If you are using Babel and are developing on a Mac with Lispworks, you can check out some of my video tutorials here for recent developer tools that I implemented: