Link Exchange

We need link exchange system. Something like [login to view URL] For Search engine optimization and increasing role of thematical links it is good for us to have own link exchange system. Attract webmasters and keep them with our system and get repocitorial links it does not have to be so complicated as [login to view URL] but has to have some it's main features. That are registration, site niche select, links files FTP upload, and partners search ability. User have to get a nice form to modify own links later, delete or add new. And links verify script is absolutely necessery. I am generally looking for a single programmer and so not so expensive, rather then some big company. Vlad