2001: Nagasaki Nightmare, Art For a Change, updated
1985: Ann Chisholm: Faces of Hiroshima, book about Hibakusha: "Hiroshima Maidens"
1995: Yosuke Yamahata: The Photographs of Yosuke Yamahata: Nagasaki Journey
ca. 1990s?: Nagasaki Nightmare, Art For @ Change
c.1970s: Keiji Nakazawa, Hadashi no gen (Barefoot Gen) vol.3, Manga
c.1970s: Keiji Nakazawa, Hadashi no gen (Barefoot Gen) excerpts, Manga
1945: Shigeo Hayashi,
Panoramas of Hiroshima after the bomb, photographs
1945: Shinkichi Kickuchu,
Hiroshima City, 2 months after, photographs
c.1998-present: The Arts Catalyst
1980s: Sisters of Survival (SOS), Jerri Allyn, Nancy Angel, Anne Gauldin, Cheri Gaulke, Sue Maberry; USA
Arte Nucleare, or Movimento Nucleare, Italy; more info + images
1951: Enrico Baj, founder of Arte Nucleare movement, Milan, Italy
2006: Julia Bryan-Wilson: Nuclear Futures.

Avenging Angels: Poster for May 1st Rally, NYC; more info

Rethinking Wargames Activate!, online

ca. 1997: Mycke:
Ban the Bomb poster

International No Nuke Cartoon, Animation + Art Exhibition, online

Protest Poster Exhibition Against the Nuclear Weapon Test by France, Tokyo, traveling

ca. 1990s?: Nagasaki Nightmare, Art For @ Change
1982: Ann Rosenthal, Stephen Moore + UNARM, Target LA, traveling; installation

Sisters of Survival (SOS), Otis Library (LA), traveling; performance, graphics, installation

1980s: Artists For Peace, Justice + Civil Liberties: Nuclear Madness Anthology; various media

1980: Mark Vallen:
Nuclear War?! There Goes My Career, silkscreen poster
1960: Ben Shahn:
H-Bomb Poster
1945 -present: Nuke Pop
The Bomb Project is a comprehensive on-line compendium of nuclear-related links, imagery and documentation. It is intended specifically as a resource for artists, and encourages those working in all media, from net.art, film and video, eco-intervention and site-specific installation to more traditional forms of agitprop, to use this site to search for raw material. The Bomb Project has gathered together links to nuclear image archives (still and moving), historical documents, current news, NGOs and activist organizations as well as government labs and arms treaties. It makes accessible the declassified files and graphic documentation produced by the nuclear industry itself, providing a context for comparative study, analysis and creativity. 
Movements + Collectives
Sisters of Survival
Art By Hibakusha (A-Bomb Survivors)
Avenging Angels poster for:
United for Peace + Justice