Rasterbator - Wall art from any image
Easy Poster Printer - Ever wanted to create your own poster?
Posteriza - Use POSTERIZA to design your own big posters and signs from any digital photo with your home...
Splashroad Separation Studio - Quick and Easy Color/Shape Separation
PosteRazor - PosteRazor is a powerful and lightweight program that cuts a raster image into pieces, allowing you to take a print and assemble them into a poster.
Vectoraster - Generate custom vector halftones, line rasters and gradients