JinnIde is a plugin that allows using Jinni Prolog, now also hosted here on this site (with open source license!), within the confines of an IDE integrated in JEdit.
The Generic Eclipse Modeling System is an MDD tool for Eclipse that allows for the rapid development of GEF modeling plugins. In GEMS, developers specify rules for a domain language using a metamodel and the tool generates a plugin for the specification
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EPromote is an Eclipse plugin that allows to define model transformations of EMF-based models with Prolog. EPromote stands for "Eclipse Prolog MOdel Transformation Engine".