Useful links
S.P.Kuznetsov "Dynamical chaos"
http://fizmatlit.narod.ru/webrary/kuzn/kuzn.htm (in russian)
Saratov group of Theoretical Nonlinear Dynamics
PHASER - a universal simulator for Dynamical Systems
Dynamics Solver - a powerful tool for research in nonlinear dynamical systems
A tool for dynamical systems research by Bard Ermentrout
Dynamical Systems section of Wolfram Mathworld
An article about dynamical systems in Wikipedia
Sprott systems - a set of systems with chaotic dynamics
Solving Ordinary Differential Equations: Nonstiff Problems
by Ernst Hairer, Syvert P. Nørsett, Gerhard Wanner
http://books.google.com.ua/books/about/Solving_Ordinary_Differential_Equations.html?id=F93u7VcSRyYC
Ernst Hairer, personal page
Wink - a free computer program for creating tutorials and presentations
Xnview - software for reading, viewing, and processing images
ATOMOSYD - a website of research group from University of Rouen devoted to dynamical systems topological analysis and modelling