Imagine Picture Viewer is a simple photo-viewer for Windows with some basic picture-editing capability. The project is based on Microsoft .net Framework. Further this project is targeted to be built for Linux using Mono.

Features:

Simple and Easy to use.
Light weight. Just 1MB!
Supports JPEG, BMP & PNG
Open Source and Free
Supports Zoom, Rotate, Flip and crop
Slideshow
Build on solid .NET Framework
Supports sending email directly from the application using GMail & Live Mail