- * 2ºQUALITY PERSPECTIVE
- **BNO** Monochrome Group
- *1ºOriginal Perspective(P1/c4)
- *Challenge You* Join the ICON Challenges!
- 4am Project
- Amateurs
- Anything Goes! Challenge Group-BACK PLAYING, COME JOIN THE FUN!!
- beach lovers. . .
- Buffalo
- Coney Island
- Critique
- Exceptional Images
- Fairytale
- Flickr Challenge Group!
- Flickr Friday
- Flickr Photographer
- Fog, rain and snow
- Food Porn
- FRIENDLY CHALLENGES
- Getty Images Call for Artists
- HCSP (Hardcore Street Photography)
- HDR
- Lonely Planet
- Los Angeles People
- Miniature Photography
- Miniature Worlds
- Nature and General Animal Photography-Showcase and Discussion
- NEW YORK CITY DEFINED
- Night Photography
- Night Shot
- NYC from A to Zed
- One Word Assignment
- Parlour Fifty-One
- Project 365
- Synesthesia Imagery
- Technique
- The Great New York State Fair
- The Light Fantastic
- The Los Angeles Group
- The Mother of All Challenge Groups - SADLY CLOSED
- The NYC Subway
- Your Best Shot 2010