Level 2 (calibrated): LMSAL
IRIS/Hinode data (LMSAL)
University of Oslo
Virtual Solar Observatory

Level 1 (uncalibrated): Stanford (JSOC)
ITN 48 - How to download IRIS Level 1 data

Combined IRIS/Hinode Search tool
iSolSearch
Sungate
Event Search
Heliophysics Events Knowledgebase

List of Flares Observed with IRIS:
Google Doc
PDF
CSV file with IRIS OBS details
IDL save-file with IRIS OBS details
High Cadence Flare Observations

ITN 10 - General Approach to Data Flow and Archiving
ITN 11 - Definition of Data Levels
ITN 12 - Definition of Keywords
ITN 13 - VSO and IRIS
ITN 26 - User Guide to Data Analysis
ITN 42 - How to obtain physical variables from Mg II h & k spectra using IRIS2 inversions.

Full-disk Mosaic Spectroheliograms

Data Analysis Tutorials
IRIS-7 Tutorials

IRIS has an open data policy. When you publish work based on IRIS data, please acknowledge IRIS as follows:
IRIS is a NASA small explorer mission developed and operated by LMSAL with mission operations executed at NASA Ames Research Center and major contributions to downlink communications funded by ESA and the Norwegian Space Centre.