MentaLog comes fully functional as an open-source project (LGPL). However the most advanced features that make it very fast and garbage-free should be of interest only to companies. The class files of the Extended Version of MentaLog can be licensed upon contacting the author at sergio.oliveira.jr at gmail.com. Free trials are also available upon request.
With the extended version you get the following additional features that make MentaLog garbage-free and blazing fast:
The latest version is 2.1.1