CMPL 1.11.0 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application lies within Developer Tools, more precisely IDE. We recommend checking the downloaded files with any free antivirus. This free software for Mac OS X is a product of Coliop Team.
From the developer:
CMPL is a mathematical programming language and a system for mathematical programming and optimization of linear optimization problems. The CMPL syntax is similar in formulation to the original mathematical model but also includes syntactic elements from modern programming languages.
You may want to check out more software for Mac, such as PowerGlot, ChIDE or flex sdk 3, which might be related to CMPL.