A short bio of James Joyce's life from The James Joyce Center: https://jamesjoyce.ie/about/james-joyces-life/
The Dedalus Library at the Museum of Literature Ireland: https://moli.ie/learning/joyce-research-library/
Joyce Images--A visual companion to the novel using images from the time
A photo series by Erich Hartmann of locations in Dublin mentioned in the novel, on Artstor
Frank Delaney's re: Joyce--A podcast in which author Frank Delaney reads and comments on the novel, line by line
A Walk Around James Joyce's Dublin--Description of a walking tour with photos and maps
A Google map of locations mentioned in Ulysses, from The James Joyce Center:
An introduction to Ulysses--from the the British Library: https://www.bl.uk/20th-century-literature/articles/an-introduction-to-ulysses
Ulysses Guide--An in-depth guide to the novel for a wide audience, by scholar Patrick Hastings: http://www.ulyssesguide.com/
The Joyce Project--A heavily annotated version of the entire novel: http://m.joyceproject.com/info/aboutproject.html
A completely searchable text version of the novel from Project Gutenberg. Click CTRL-F to search.
The Rosenbach Museum is only a few blocks from Curtis, and it has a collection of materials related to Ulysses, which you can see for yourself: https://rosenbach.org/collection/james-joyces-ulysses/
A Concise Plot Summary of Ulysses from the Rosenbach: https://rosenbach.org/ulysses-plot-summary/
You can also participate in a Bloomsday reading of Ulysses this summer!
Entry fee to the museum is only $5 for students. See their website for more information.