ANTLRMagikGrammar is a project mainly written in ..., based on the View license.
Grammar for Magik in ANTLR
This is an ANTLR3 grammar which parses Smallworld Magik code. It is not fully complaint to the Magik 'standard', but parses most of the code I could find.
The grammar is released under a BSD license. Please, do send some feedback when you are using this grammar. The source and contact information can be found at https://github.com/StevenLooman/ANTLRMagikGrammar.