A free alternative to the popular audio limiter L1 is available as a clone.
One interesting fact about Waves L1 (and thus W1 Limiter) is that it uses a release time that is three times longer than the standard RT60 metric. This means that if you set a 50ms release time in the limiter, it will actually yield with 150ms standard RT60 release time.
Overall, I would recommend W1 Limiter to those who are in need of a plugin that delivers high-quality audio. It is a great option for those who want to have compatibility with Waves L1 and want to achieve an identical output as well. The unique release time is also a nice feature that gives the software an edge over other limiters in the market.