Scientists often need to use data analysis and plotting software. For Windows systems there is a well known and widely used software called Origin, which is not free, of course. The purpose of this project is to develop a free (open source), platform independent alternative to Origin. QtiPlot can be successfully used for teaching as well as for complex data analysis and visualisation and is being used in companies, universities and reseach institutes all over the world. QtiPlot is being actively improved, all your suggestions to our "wish to" list and all your contributions are most welcome!