* [bittorrent-tracker v11.2.3](https://github.com/webtorrent/bittorrent-tracker) – Node.js client and server implementation supporting HTTP, UDP, and WebTorrent tracker protocols.

* [Snowplow JavaScript Trackers 4.8.1](https://github.com/snowplow/snowplow-javascript-tracker) – JavaScript trackers for collecting user event data from websites and Node.js applications.