Hi @sunnyschafieh,
All “registration” plugins in WP use the same system–the underlying WP tables for users and roles. They can put different looks on it, but they all go through the same WP users to manage them. So when you say “not through the WP registration”, that’s not entirely possible. You can, however, avoid USING the WP given login screens and that’s what most registration plugins can help with.
As long as a WP registration plugin configures the login and registration URLs and supports the “redirect_to” parameter from the WP Codex, we can work with it. AWPCP has settings for this under Classifieds->Settings->Registration.
But we don’t have a recommendation for a specific one, because there are a LOT of them out there and most are OK as long as they support what I said above. You may want a membership plugin to do the restriction of content, but that’s more advanced than what you said above…so that’s just a guess.
