Wikipedia's List of Photo Sharing Sites

23
organize and share photos
Upload 30 images per month for free or pay 20 € a year to get unlimited upload

Bayimg
free image hosting, no registration required, uncensored
unlimited storage for 547x410 pix reduced images

Bilddagboken
Free image hosting, registration required
Unlimited storage for 547×410 pix reduced images, also unlimited resolution and size for paying BDB HD users, costing approximately equivalent to $10.5 a year

damodo.com
free image hosting
JPEG, PNG, SVG
Storage space varies depending on account (50 MB - unlimited).

Deviantart
free image hosting, ad-free, no registration required
(unlimited) 8MB per photo

factini
social image hosting - all uploads done via email, no registration required (unlimited) 10MB per email

Flickr Open (Yahoo! login)
100MB monthly upload limit (10MB per photo), max 200 images viewable (free account. If a free account is inactive for 90 consecutive days, it will be deleted.

Fotki
Free registration photo sharing service and communication portal. 50MB for free, unlimited storage for $30/year

fotocommunity
Europes largest community for non-professional Photographers different membership-models, starting free

Fotolog
Photoblogging. Popular in South America.
The free version is ad-supported, and limits users to uploading one picture per day
Paying members can upload up to 6 pictures a day

Fotopic.net
Portfolio and photo sharing service.
250MB for free, Premium service gives 2GB/year, ad-hoc increments in one-off fee.

Burn-Blue.com
Imagehosting and photo sharing service.
20MB File Size per Images - Free Sign-UP - Host as many images as you want.

Fotopu
free image hosting, no registration required

GazoPa Bloom
flower photo sharing service

GlowFoto
free signup

GotSharing.com
GotSharing? Its Good For The File! Free Unlimited Photo Hosting! Good For Twitter
2 MB Limit

ImageHosting.com Free image hosting with no registration required. Top ranked in Google for image hosting keyword.

ImageShack
5th largest photo hosting service

iMGSRC.RU
Free Registration(Required for hosting); Photo Sharing
Unlimited images, 10MB per image, 1024x768
75 images for free accounts. Unlimited for pro accounts.

Impress on me
Image hosting service for the sharing of found images, registration required
JPEG, GIF, PNG, hot-linking allowed

Ipernity
Photo/video sharing, Groups, Blog
Unlimited image display/storage for paying users (200MB p/month upload, only last 1000 displayed with free account)

Ispoops.com
Free Image hosting service no registration required, Blogs, Spoofs
JPEG, GIF, PNG, hot-linking allowed

Jalbum
free hosting of galleries created with Jalbum software
30mb of space given for free accounts, upgrade to 1gb space for €19/year

Kodak EasyShare Gallery
free registration service, archiving photo service for $25/year
used to be unlimited low-resolution, paid users can download high-res images that they've uploaded. New minimum purchase requirements 3/09: $4.99/yr for 2GB or less, $19.99/yr for more than 2GB.

Lafango
Free Registration, customizable galleries & folders.
Unlimited storage

Memeo Share
Free photo and video exchanging software, files are shared desktop to desktop without being resized.
1GB is free, Premium account is $4.95 a month

MyAlbum
photo sharing service in The Netherlands
1 GB after free registration

MobileMe Web Gallery
subscription service
10GB (standard level)

MyOtherDrive
online photo sharing and backup
5GB free after registration, 25GB and more with subscription

MyPhotoAlbum
free image and video hosting
(unlimited) 20MB per photo. Supports nested folders structure. Requires to 'keep your account in good standing', i.e. buying stuff from them (or their partners) every 365 days.

Panoramio
free registration service
Unlimited provided the photos comply with the Google Earth Photo Acceptance Policy

Photo Art Gallery
Free photo sharing site for emerging photographers. Buy and sell photo prints and canvases. 2GB

Photobucket
free registration service
500 mb free storage (25 GB with paid PRO account)


Picasa
free registration service
GB of photos for free space, then $5/20GB per year

Picturetrail
free registration service

Piczo.com
free registration service

PurePhoto
free registration service (organize, learn, share, print, sell photos) JPEG, PNG, GIF
1 GB of photos for free space, then $79/unlimited per year

Radar.net
Free registration

Rebee
Re-live experiences through images. Automatically sort and classify your pictures from Facebook, Flickr or Picasa. Free service accessible with Facebook account.
No limit as images are stored on other services.

screen.cz.cc
Free Image hosting service for the sharing images, direct upload from URL or from local path, registration is optional.
GIF,JPG,PNG,BMP,size limit of 1MB for unregistered users, 2MB for registered, hot-linking allowed, unlimited bandwidth.


ScreenshotUploader.com
Easy and free screenshot sharing.
One click publishing. Provides program.

Showzey
Collect photos from Gmail, Picasa, Flickr, and Facebook, organize, and share photos.
No registration: OpenID (Yahoo! and Google) and Facebook Connect (Facebook)login
free storage for images extracted from Gmail

Shutterfly
free registration service

Snapfish free registration service
also provides services for Costco's online photo processing store unlimited, pay per download
Sneppi
free registration service.

TinyPic
free image hosting, no registration required

Webshots
free registration service

Zooomr
free registration service
Unlimited uploads and unlimited storage for ALL users.