Introductory

Principles (General) Principles of Macroeconomics
Principles of Microeconomics Maths for Economists
Statistics for Economists  

Intermediate

Intermediate Microeconomics Intermediate Macroeconomics
Econometrics Experimental Economics
Financial Economics Game Theory
International Economics Mathematical Economics
Monetary Economics  

Advanced

Advanced Microeconomics Advanced Macroeconomics
Economic Theory
Latest Addition:
James Hamilton, University of California at San Diego

Software company Estima hosts example downloadable RATS files enabling replication of the examples used in many textbooks, including James Hamilton's 'Time Series Analysis', Brockwell and Davis' 'Introduction to Time Series and Forecasting', Greene's 'Econometric Analysis', Gujarati's 'Basic Econometrics' and Stock and Watson's 'Introduction to Econometrics'.