There are "indoor vent kits" sold by most hardware stores and appliance parts suppliers. They consist of a length of flexible ducting and a bucket that holds a small amount of water to collect any lint that gets past the dryer's lint filter.
They work pretty well but the bucket has to be cleaned regularly and the water changed as it can get pretty scummy. Some lint may still escape into the immediate area. In the dry winter months, the humidity recovered from the dryer exhaust help to keep you house more comfortable.
You can see an illustration of one at the following link: