LearnChemE (University of Colorado Boulder): More than 100 short screencast videos for separations and mass transfer including example problems, introduction to topics, and explanations of how to use diagrams.
Liquid-Liquid Ternary Separations (University of Sheffield, University of Manchester): An interactive system to learn how to use ternary phase diagrams and design liquid-liquid extraction systems
LearnChemE (University of Colorado Boulder): More than 55 interactive simulations that can be run with a free CDF player plug-in.
ConcepTests
Multiple-choice conceptual questions for use in class with student response systems (clickers)
ChemSep column simulator: For distillation, absorption, and extraction operations. It combines the equilibrium stage column model with a nonequilibrium (rate-based) column model.
VLE Calc: Interactive modules that generate phase diagrams for 1, 2, or 3 components.
CheCalc: Downloadable spreadsheets for vapor-liquid equilibrium and distillation.
SeparationProcesses.com: Extensive information on distillation, gas absorption, solvent extraction, humidification, adsorption, membrane separations, and more.