Min.us is free photo sharing service that allows you simple drag drop sharing system. No sign up is required for using it. The interface of the min.us is very simple then you can use easily.
To upload your image, simply go to min.us web page simply drag and drop image into min.us home page then you will get URL of the image, this used to share others. Your friends can download images as a zip files.
It allows you to upload image upto 7 MB and 50 photos per gallery. It currently supports JPEG, GIF, PNG, APNG and BMP formats. It supports major browsers it includes Firefox 3.6+, Google Chrome and Safari for Mac.