GNU SnakeCharmer (related to GNU GIFT) has been decommissioned, since it never came to fruition. But if you're interested in working on it, it can always be revived! Please take a look at this general information about GNU packages and being a GNU maintainer, and then email firstname.lastname@example.org with a bit about your background and particular interest. Thanks.
The raw source files are available here: Charmer-0.2b.tar.gz, ViperPHPInterface.zip, ViperPHPInterface.tar.gz.