An Introduction to Surface Chemistry: A comprehensive resource on fundamental surface science concepts.
NIST Chemistry Webbook: Contains vast amounts of data on physical and chemical properties of chemical species.
FCC Lattice: An interactive animation of the face-centered cubic lattice.
Lecture Notes on Surfaces and Thin Films: From a surface physics course at Arizona State University.
The North American Catalysis Society (NACS): Catalysis information and news, job postings, and more.
Upcoming Catalysis Meetings: A list of many catalysis-related conferences over the next few years.
VASP the Guide: Official VASP documentation.
Hands-On VASP Sessions: A series of presentations on using VASP.
Quantum Quibbles: A blog containing several informative posts about specialized VASP calculations.
VASPTips: A set of hints, tips and tricks for using VASP.
VASP Scripts: A collection of scripts for use with VASP.
Bader Charge in VASP: A guide to calculating the Bader charge from a VASP calculation.
DFT Introduction: Some in-depth introductions to density functional theory.
MIT's Atomistic Computer Modeling of Materials: A potentially useful class from MIT's OpenCourseWare.
VASP Quick Start Guide: Most of this will not apply to most VASP users, but it includes a list of elements that require alternately-named pseudopotentials.