Explorecams - Explorecams allows you to search through thousands of images that people taken on specific photo camera bodies & lenses.

BlockParty - Real-time voice chat rooms from the creators of turntable.fm

CameraDecision - CameraDecision helps users to find a camera based on pros and cons, comparisons, and descriptions.

Red Block - Red Block is a browser extension that lows you to block users from your Twitter account.

Photography PX - Photographypx, your one and only stop for latest camera gear reviews, tutorials, with industry leading photographers and courses to get you started right

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.