vinyl stained glass window film; I've used this product myself several times in different patterns, and have absolutely loved the result every time! And of course it's way cheaper than actual stained glass. This particular site has it for $25, but I bought it locally at Home Depot.
Glass Pebbles from the Dollar Store create this stain glass window look. This would be fabulous in the garden with the sun beaming through.The Homestead Survival: 99 Cent Store Glass Pebble Stain Glass Window DIY.