- 500px.com
- A different point of view - for photographers
- Abstract Photos
- Abstract_ photo (post 1 / com 2)
- Amazing iPhoneography
- bitches brew | NO PEOPLE!!!
- COLOUR PRIORITY
- CreativePhotographersGallery. BeCreative!
- Diagonal Love Affair
- Doors & Windows Project
- Doors and windows
- doors of the world
- Fences & Fencing
- Flags Of Imaginary Countries
- Flickr API
- Flickr Ideas
- FlickrCentral
- FOTOGRAFIA AMBULANTE. Eclectic & emotional photo troupe
- Geometric Shapes in Real Life
- Guess Where Portland (PDX)
- haphazart! Abstractions
- Hipstamatic
- Life In LoFi: iPhoneography
- Lifeless Faces - always something to talk to
- looking in looking out : windows
- lovers of windows & balconies (read rules !)
- M4/3
- MINIMAL black&white
- Minimalist art
- Olympus E-M1 Photography
- Olympus E-System Community
- Olympus OM-D Original (3xO)
- Olympus OM-D Series Photography Sample Group
- Olympus PEN-F - Micro Four Thirds
- Olympus PEN-F,OM-D E-M1, E-M10, E-M5 and E-M5II user
- One a Day
- Oregon
- Patterns As We See Them
- pavement
- pdx [portland]
- PDX Nightowls
- Photo Technical
- Photos that should be exhibited in Tate Modern
- Portland Bridges
- Portland Flickr Junkies
- Portland Graffiti
- portland photographers
- Portland, Oregon in Black and White
- Red Rule
- Selected minimum
- Self Taught Photographers - LOOK AT DISCUSSIONS FIRST!
- ShapeMaker Group
- Shapes.
- Simple and minimalistic
- Stick Figures in Peril
- Stripes
- stripes ||| group
- Textures
- The Daily Post
- The World Through My Eyes ...
- Through the Lens of an iPhone
- Türen/Tore/Doors/Portals
- Urban Decay
- Urban Geometry
- Urban Minimalism
- yellow | orange | red
- Zen~spiration
- ~~fence friday~~(the original)