The Greenphone was a smart-phone developed by Troll tech with Qtopia Phone Edition, a GUI and application platform embedded in Linux using mostly free and open source software. The proprietary software on the phone includes the communications stack and the package manager. However, Troll tech put these components under GPL in version 4.3 of Qtopia, making it possible to run the Greenphone without any proprietary components by updating its software to Qtopia 4.3.
On October 22, 2007, Troll-tech announced that it had sold all inventory of Greenphones and would no longer continue production, having achieved its goal of promoting the Qtopia platform and gaining interest from developers. Focus was shifted to development of the Neo FreeRunner phone. Troll-tech intends to continue supporting the Qtopia Greenphone community and alternative hardware, such as the Neo 1973.