Waves are offering their OneKnob Louder plugin (usually $49) for FREE until August 19th, 2021.
According to the Waves website, the OneKnob Louder plugin applies "a combination of peak limiting and low-level compression with automatic makeup" to make individual tracks louder, increasing RMS by up to 24 dB.
OneKnob Louder follows the same simple design as other plugins in the OneKnob series, and is therefore incredibly simple to use. I found it useful in taming my bass and in adding a bit of Oomph to my drums.
You need to register with Waves.com and fill out a short questionnaire in order to download the plugin. Be Quick as the offer is only available this weekend ! Download from HERE