Home depot sells a product called furniture transitions. We just used it to refinish an oak chest to espresso. They offer loads of colors. Total cost for all supplies was I think around $80. The kit itself was about half that cost.
You may find cheaper alternatives but this kit provides everything (minus a few odds and ends but it has a checklist so you only make ONE trip to the store).
I am thrilled with the results. Dh and I sat through a free how-to class at home depot which was well worth the time.