Swarm Intelligence - A new book talking about particle swarm optimization by J. Kennedy, R.C. Eberhart, and Y. Shi.
AdaptiveView Computational Intelligence Resources - Contains links to computational intelligence (CI) resources and to an open source Java implementation of Particle Swarm Optimization (PSO).
The PSO Toolbox : Home page - The PSO TOOLBOX is an open source toolbox available as Matlab (.m) files and Java (.class and .java) classes.
Particle Swarm Optimization Resources - Mathematical analysis of Particle Swarm Optimization. Discrete, fuzzy PSO.
All about Particle Swarm Optimization - An website about particle swarm optimization and swarm intelligence, including introduction, bibliography, tutorials, links to online papers
Particle Swarm Central - Mainly information and links to information about Particle Swarm Optimization.
Particle Swarm Optimization Visualization - A simple Java applet which visually demonstrates a particle swarm searching for a maximum value in a 3-D landscape.
Darwinian Particle Swarm Optimization - An adaptation of the Particle Swarm Optimization algorithm.
Bibliography of Particle swarm optimization - One of the most comprehensive reference lists