IrfanView - IrfanView ... one of the most popular viewers worldwide.
Mega - Secure File Storage and collaboration
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Dropbox - Online Sync and File Sharing
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
MediaFire - MediaFire is the simple solution for uploading and downloading files on the internet.