The Expert System For Thermodynamics - TEST is a visual environment to solve thermodynamics problems, pursue what-if scenarios and perform numerical experiments. - http://energy.sdsu.edu/testcenter/
The Second Law of Thermodynamics - A qualitative introduction to the second law and entropy written for beginners in chemistry but useful for physics students too. Explains relationship with Murphy's Law. - http://www.secondlaw.com
Fundamentals of Thermodynamics - Lecture notes and problems from University of Pittsburg. - http://puccini.che.pitt.edu/~karlj/Classes/CHE2101/
Properties of Heat and Matter - Online book on Thermodynamics at UC Berkeley. - http://www.mip.berkeley.edu/physics/bookcdx.html
About Temperature - A very basic (prepared for the middle school math teachers) tutorial but still useful for professionals. - http://my.unidata.ucar.edu/content/staff/blynds/tmp.html
Thermo Fluids Engineering - web page of the division of the Eindhoven University of Technology which study processes where fluid flows and heat transfer play a prominent role. - http://www.tfe.wtb.tue.nl
Basic Terms and Theory - from Engineers Edge. A definitions, short explanations and conection of basic thermodynamics therms. - http://www.engineersedge.com/thermodynamics/table_contents.htm
All Thermodynamics - from HyperPhysics portal. This is rather a comprehensive online physics handbook containing "Thermodynamics" chapter. Site has a handle navigation, good illustrations, and very detail content. - http://hyperphysics.phy-astr.gsu.edu/hbase/heacon.html#heacon
Internal Combustion Engines Web Site - Thermodynamics and heat transfer in Internal combustion engine. Applets are used to perform simple calculations. Developed at Colorado State University. - http://www.engr.colostate.edu/~allan/engines.html
Thermodynamic Toys - Contains directions for making toys with thermodynamics background. - http://www.scitoys.com/scitoys/scitoys/thermo/thermo2.html
Converter of physical unit. - Comprehensive converter of different physical units, including thermodynamics. - http://www.members.optusnet.com.au/ncrick/converters/heat.html
Thermodynamics and Statistical Physics - Collection of educational sites explaining all aspects of thermodynamics. - http://sky.net.co/physics/termo.html
Applied Thermodynamics - Definition and short explanations of terms, units and basic principles. - http://www.taftan.com/thermodynamics/
Thermodynamics from Prof. Ian Waitz - Basic thermodynamics course of 12 lectures, contains else the self-control questions with statistics of answers. - http://web.mit.edu/16.unified/www/FALL/thermodynamics/index.html
Thermodynamics and Its Applications - Companion site to the textbook by J. W. Tester and M. Modell, includes answers to selected problems and current errata. - http://web.mit.edu/testerel/thermo/
Ideal Gas Law - Applet illustrating the ideal gas law : action of a piston in a pressure chamber filled with ideal gas. - http://jersey.uoregon.edu/vlab/Piston/index.html
A Concise History of Thermodynamics - An overview of the history/evolution of thermodynamics. This is an excerpt from a biography of J. Willard Gibbs. The overview is available from the site in MS Word or pdf/Acrobat format. - http://www.thermohistory.com/
Carnot cycle - Applet showing the physics processes of a Carnot heat engine by Fu-Kwun Hwang of the National Taïwan Normal University. - http://www.phy.ntnu.edu.tw/java/carnot/carnot.html
Thermodynamics Research Laboratory - Classical, Quantum, Nanoscale & Statistical Thermodynamics & Mechanics data and property calculation Sites. - http://tigger.uic.edu/~mansoori/Thermodynamic.Data.and.Property_html
Thermodynamics and Thermal Physics - About.com's index to thermodynamics information. - http://physics.about.com/cs/thermodynamics/index.htm