Upload Pie
A simple and easy to use tool for temporarily sharing images and text.
Simple because that's the only function of the page, and secure because all uploads expire after a chosen time interval (ranging from 30 minutes to one week).
Designed by Mark Dormand and developed by myself. The tool is still in beta and I plan to revisit it to update certain aspects, such as the upload form to make sure it looks and functions the same across as many browsers and operating systems as possible. Even in its current beta phase the tool is already used by many people. It has now hosted already more than a thousand files and has ever increasing traffic.