FeatureHouse is a general approach to the composition of software artifacts. FeatureHouse is language-independent in that software artifacts written in various languages can be composed, e.g., source code, test cases, models, documentation, makefiles. Software artifacts are represented as feature structure trees (FSTs) that capture the essence of an artifact's modular structure in the form of a tree. As composition paradigm, FeatureHouse supports two approaches: superimposition and three-way merge. FeatureHouse consists of a tool for superimposition, called FSTComposer, a tool for three-way merge, called FSTMerge, and a plug-in and generation mechanism for integrating new languages automatically, called FSTGenerator. FeatureHouse can be used with the visual development environment FeatureIDE. For more information consult the project's wiki here on github or the project's website at the University of Passau (http://fosd.net/fh).