Stanford On-Line Courses: http://see.stanford.edu/SEE/Courses.aspx (see Convex Optimization - Prof. Boyd).

MIT On-Line Courses: http://ocw.mit.edu/courses/mathematics/18-06-linear-algebra-spring-2005/ (Linear Algebra - Prof. Gilbert Strang).

Power Systems Research Consulting (see Publications): http://www.psr-inc.com.br 

PUC-Rio Repository (Maxwell): http://www.maxwell.lambda.ele.puc-rio.br/series.php?tipBusca=dados&nrseqser=1

Fico Optimization (Xpress MOSEL optimizer): http://optimization.fico.com/product-information/
Manual and student licences available for download (free): LP, MILP, Nonlinear, Stochastic.

Optimization On-line (e-print papers Repository): http://www.optimization-online.org/

Stochastic Programming Community (Paper Repository): http://stoprog.org/