Applied Probability and Stochastic Processes  
   An online course by Wlodzimierz Bryc in DVI, PS and HTML format.
   http://math.uc.edu/~brycw/probab/books/

Calculus and Probability  
   Online course by Stefan Waner and Steven R. Costenoble
   http://people.hofstra.edu/faculty/Stefan_Waner/cprob/cprobintro.html

Introduction to probability  
   A comprehensive course in probability by Oliver Knill
   http://www.math.harvard.edu/~knill/index.html

Lectures Notes from Varadhan  
   From S.R.Srinivasa Varadhan in pdf and ps formats, on measure theory, harmonic analysis, statistics and stochastic processes.
   http://www.math.nyu.edu/faculty/varadhan/

Introduction to Probability  
   An online textbook in PDF format, by Charles M. Grinstead and J. Laurie Snell
   http://www.dartmouth.edu/~chance/teaching_aids/books_articles/probability_book/book.html

Probability Theory: The Logic of Science  
   Online textbook by E.T. Jaynes in PS format.
   http://omega.albany.edu:8008/JaynesBook

Probability by Surprise  
   Contains class notes and applets for teaching an introductory probability class to engineers.
   http://www-stat.stanford.edu/~susan/surprise/

Steven Shreve's Lectures on Stochastic Calculus and Finance  
   Notes in probability theory prepared by Prasad Chalasani and Somesh Jha, with a strong bias towards financial modeling and option pricing.
   http://www.cs.cmu.edu/~chal/shreve.html

Stochastic Calculus Notes  
   These notes by Alan Bain provide a complete elementary introduction to stochastic integration with respect to continuous semimartingales.
   http://www.statslab.cam.ac.uk/~afrb2/

Virtual Laboratories in Probability and Statistics  
   Interactive course by Kyle Siegrist.
   http://random.math.uah.edu/stat/

An Introduction to Queueing Systems  
   Educational material for the study of queues and queueing networks. It includes details on book "Introduction to Queueing Systems", sample sections, solution manual for problems, tests and their solutions
   http://home.iitk.ac.in/~skb/qbook/qbook.html

Today's Lecture by Ashay Dharwadker  
   Daily lecture notes for a course on algorithm design at Ansal Institute of Technology.
   http://www.geocities.com/dharwadker/lecture.html

Mike McLaughin's Probability Distributions Compendium  
   A Pdf file describing many common probability distributions and their properties including, pdf, cdf, moments, and random variate generation.
   http://www.geocities.com/~mikemclaughlin/math_stat/Dists/Compendium.pdf

Stochastic Analysis  
   Extensive lecture notes from Timo Seppalainen
   http://www.math.wisc.edu/~seppalai/courses/735/home735.html

Probability lecture notes  
   Lecture notes from R.F. Bass
   http://www.math.uconn.edu/~bass/lecture.html

Probability and Random Process Class Notes  
   Class notes for a university course on probability and random processes, by John L. Stensby. Notes are in .pdf format. Introductory through advanced topics are covered.
   http://www.ece.uah.edu/courses/ee420-500/