123 Buttons is a banner exchange for buttons. This service allows you to choose your own button size from the option of three. These three sizes are 88x31, 120x60 and 468x15 pixels. Link Exchange is Microsoft owned link exchange program. This program is one of the most famous banner networks on the web.
Smart clicks is a new banner network.
This banner network is growing very fast. They are hosting hundreds of banner every day. Also this service promises you to give you all the banners under the size of 10Kb. Banner Swap can display your banner to lots of site. Hyper Banner serves over 25,000,000 banner-ads per month.