Finite Model Theory Homepage: People, problems, bibliographies, events.
Introduction to Model Theory: Homepage of a lecture course by Natasha Alechina, with a particular emphasis on topics relevant to computer science, such as bisimulation.
Model Theory of Fields: Suggested Reading: Short list of online resources compiled by David Marker.
Model Theory. Skolem's Paradox. Ramsey's Theorem.: Introductory essay by Karlis Podnieks, constituting appendices 1 and 2 of his book `Around Goedel's Theorems'.