Knopflerfish is a non-profit organization, developing OSGi related material. The project provides an easy to use open source implementation of the OSGi R4 v4.3 Core Framework and Compendium Specifications, as well as related build tools and applications. Knopflerfish is available under a BSD style license.
Knopflerfish 5, the next major release of Knopflerfish, is designed to be implemented according to the OSGi R5 specifications. A beta version of Knopflerfish has been released.
Knopflerfish (KF) is a spin-off project from Gatespace, which was one of the founding members of the OSGi Alliance. During a reorganization of Gatespace in the spring of 2003 it was decided to open source Gatespace's OSGi framework GDSP. The Knopflerfish organization was founded and the code from GDSP was donated to Knopflerfish. Erik Wistrand was elected president and he led the work in transforming the closed source GDSP into an open source Knopflerfish distribution. Makewave, consisting of the core OSGi development team from Gatespace, is the primary maintainer and sponsor of the Knopflerfish project and has several developers assigned to develop and maintain the Knopflerfish OSGi distribution.