I've done some searching to find links relevant to issues and ideas mentioned
in the Haggadah. They appear woven throughout the text of the online Haggadah.
Where appropriate, the
button
links to the page of the Haggadah, otherwise the
button links out. The number in brackets is the date [yymmdd]
the item was added.
Much more exists than what I have here; I made an editorial decision about what I found interesting, unique, special and would serve as door-openers to further exploration.
This is a subject organized list of them. It exists as much for me to be able to check currently active links as it does for others to be able to use the Haggadah.

Lights
In Action Passover links

Chabad's
Haggadah collection/bibliography

Haggadah
for the Liberated Lamb

The
Howard Rheingold Family Haggadah

Temple
Emanuel's Virtual Seder

Rabbi
Amy Scheinerman's Haggadah pages

Child-centered
Passover Haggadot/stories of John Kador

Lights
In Action four Questions

Four
Questions of Meloncholy : Poems by Tomaz Salamun

Four
Questions the Kidlink Response

Lutheran
guidelines for the use of the Passover Haggadah

Wine (see internally for multiple links)

Bioethics
and the Passover Lamb

Mahomet-Seymour
Junior High School Holocaust Project

Mutual
Aid and Self-Help Groups [970404]

Congress
of Secular Jewish Organizations

Jewish
Reconstructionist Foundation

Mazon:
A Jewish Response to Hunger

Union
of American Hebrew Congregations
Last modified on 24 January, 2001