Jim Morren offers a set of flare effects for Blender.
This product is great for adding feeling/atmosphere to your scenes, be it animation or still images, with this product you will add life to your light sources. This Pack contains four different and unique flares, each designed to be both simple, easy to use and greatly customizable to fit perfectly into any of your scenes. Each flare is designed to stimulate a surtain atmosphere
Flare Compositing Pack – Vol 1 sells on the Blender Market for $22.95.