ePHOTOzine - Photography website with camera, lens and smartphone news, reviews, photography techniques, plus a photography gallery and forums, with photo competitions, blogs and buyers guides.
BlockParty - Real-time voice chat rooms from the creators of turntable.fm
Explorecams - Explorecams allows you to search through thousands of images that people taken on specific photo camera bodies & lenses.
Red Block - Red Block is a browser extension that lows you to block users from your Twitter account.
CameraDecision - CameraDecision helps users to find a camera based on pros and cons, comparisons, and descriptions.
Secateur - Use Secateur if you want to temporarily or permanently block or mute (or both block and mute) a Twitter account and all its followers.