DAE Solver solves systems of algebraic and/or differential equations and performs linear stability analysis, searching for turning points, simple bifurcation points, and Hopf bifurcation points. Some higher index problems (index 2 and above) can be solved too, including problems on mechanical systems with holonomic constraints. Multiple documents are allowed, with unlimited undo. Results are generated as tables, graphs, and movies. AppleScript is supported, with scripts that DAE Solver builds as a problem is defined and that can later be customized.