I have not personally used eSyndicat yet but it looks like a very robust directory script with an impressive demo. The features parallel those of Indexu’s but it does contain 12 free templates you can use compared to Indexu’s 5 or so as well as many plugins you can purchase to extend the functionality of your directory.
They do offer a free version of their software you can test out. Their unlimited domain license is one of the cheapest out there at $499.
