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.
Unsplash - Unsplash is a website with high-quality free HD images. It has a catalog of more than three hundred thousand striking images that are neatly organized with tags. Read more about Unsplash.
Twitter One Click Block - Add a block button for a simple one click blocking.
Pixabay - Over 270,000 free photos, vectors and art illustrations
Twitter Block Chain - Chrome extension to block all followers/following on a page