Here are some texts on symplectic geometry I found on the web. Sorry if the links no longer exist.
Symplectic Toric Manifolds [.ps] by Ana Cannas da Silva
Symplectic Geometry [.ps] by Eckhard Meinrenken
Notes from Spring School 2004 [.pdf] by J.J. Duistermaat
Part A and Part B [.ps] of notes by Kai Cieliebak
Convexity properties of Hamiltonian group actions [.ps] by Victor Guillemin and Reyer Sjamaar

A few textbooks on differential geometry found online in December 2004.
Manifolds and differential forms by Reyer Sjamaar
Topics in Differential Geometry [.ps] by Peter W. Michor

More books / notes / surveys online:
Lie Algebras [.pdf] by Shlomo Sternberg
Representations of sl(2) and their geometry [.ps.gz] by Christoph Müller
Recent developments in toric geometry [arXiv, 1996] by David A. Cox