We recommend Christine's site and her book "How to Rent Vacation Property by Owner." We have used the information here successfully ourselves in renting vacation homes and have found it to be a useful resource. Christine also offers other tools and seminars throughout the country.
This site is the 500 pound gorilla of websites utilized to market "by-owner" rental propery. This company has gobbled up a few of the dominant players in the "by-owner" rental industry.
This was the original, and in my opinion still the best, "by-owner" rental propery. We have had great success using this site to rent property.
An availability calendar, virtual guestbook and credit card merchant services website. Very useful tools for someone who is renting "by-owner." Also integrates with VRBO site.
Great resource for billing and collecting rent over the Internet. Secure service created by eBay. Also allows credit card billing and invoicing services without necessitating a merchant account.