This web application reads data from DDBST's collection of VLE data for 30 important compounds. Binary vapor-liquid equlibrium data of 30 Important Components from Dortmund Data Bank can be accessed from the web page. It correlates the isothermal data with Margules model, Redlich Kister (truncated to two terms), van Laar model and Wohls expansion (truncated to one term).
Here's the link: VLE Data