Differential equation solvers in open source

Differential equations are ubiquitous in science and engineering. In this work, we propose to make a comparison of open source software systems to solve differential equations. The comparison has to be made from the following angles: (1) ability to solve difficult (stiff) problems (2) ease of learning (3) ease of use (4) computational efficiency (5) versatility and (6) availability. A particular focus will be on the use of XMLlab of Scilab to solve differential equations.