TopTbdev looks like a tracker, but there is no torrents. It's invite forum with tracker interface. You have option to vote and comment on private trackers. System is clear and user friendly.
Here's you see how it's look like:
TopTbdev have very active forum when you can talk about everything related to bittorrent, make invites giveaway, invites request. There is also recruitment forum section:
Now we have another free invites code to register on TopTbdev. Procedure is simple: copy invite code, go to http://toptbdev.net/signup.php and use your invite code to register. After registration you must wait for our confirmation of your account!
New pack of valid codes: