Pastpin is a cultural search engine that aims to showcase the 7M historical images available from Flickr Commons.

Users are prompted to add new metadata (geocodes, temporal data) to existing images that they may recognise based on their current location. The goal of the project is to crowdsource spatial and temporal metadata for these objects.

Visitors to the site can search or browse by using free text, or by going directly to the map and clicking on a thumbnail to view images directly.

This is a free to use online image editor with a fair amount of features. I use this primarily for quick editing jobs such as resizing and cropping small images. The online editor will load images from your computer or via url which is incredibly handy. There is a firefox plug-in available too which makes the time it takes to view an image, edit, and save it, a fast process. The source code for the application is closed, but the dev team does offer a free API. Pixlr also has tools for mobile devices, one of which is paid app for $1.