PaperToolkit is a free, open source toolkit for designing pen and paper applications. Applications generated with this tool are intended for printing on a paper surface that allows some digital interaction, such as the related ButterflyNet or Interactive Gigapixels Prints. Suggested applications include interactive newspapers and smart notebooks. This toolkit is currently under development; code, documentation, tutorials and demo applications are all available.

SRILM (SRI Language Modelling Toolkit) is a toolkit for language modelling first developed in the 1990s and still in active development. It has applications in speech recognition, statistical tagging, segmentation and machine translation. The toolkit is available for Windows and UNIX, and users have developed a variety of extensions for it.

AGTK is a suite of software components for building tools for annotating linguistic signals, time-series data which documents any kind of linguistic behavior (e.g. audio, video). The internal data structures are based on annotation graphs. Annotation Graphs are a formal framework for representing linguistic annotations of time series data.

(Note: last release 2007. Last update on sourceforge page 2011). The links on the sourceforge page are broken: software is reportedly released under a 'Common Public Licence', although the link to the licence at http://www.opensource.org/ is broken; link to the project website at the Linguistic Data Consortium is broken.

CMAP allows users to create, navigate, and share concept maps that can easily be displayed online using HTML and Javascript.