RasterVect - Professional raster to vector conversion program (vectorizer).
Img.vision - Image hosting & video hosting for eCommerce sellers
vectorization.eu - Free online vectorization tool that can help you turn black&white and colored images into a vector format.
UploadHouse - Thumbnail and resize your photos and images
LineTracer - Tool for converting scanned hand-drawn sketches to vector format
ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.