The benchmark problems include translations of problems that have been frequently used in the development of algorithms, as well as new problems based on chemical rate equations. The problems, their best solutions and the source models from which problem data was simulated are all available on our web site. This makes it easy for everyone to evaluate and compare algorithms in a reproducible way. To maintain a useful collection of problems of various types, we intend to extend the collection, and are interested in contributions and feedback from others, see the web site.