Abstract: This invention relates generally to software, and more specifically, to systems and methods to establish a directory of any kind of offer, whether commercial or non-commercial. The invention enables any person to create a forum for any kind of offer without the intervention or action of the operator of the directory, permitting the directory to be extended to offer types not even understood by the operators of the directory. The invention further enables persons making offers of every type to advertise their offers in such directory, and to rapidly update their offers as market conditions change. The invention further enables consumers to review offers in such directories, and compare offers based on price, years of experience, and other quantified metrics.