Trade
Trade blog by Jonathan Dinger (Chicago)
Trade podcast by Chad P. Bown (Peterson Institute) and Soumaya Keynes (The Economist)
Applied Metrics
How the (Econometric) Sausage is Made by Dan Millimet (SMU)
Data
Trade data by country (WITS)
CEPII
USITC
Brian McCaig's notes on Vietnam's data
Quantitative methods
https://quantecon.org/