FREE Plugins
Mono Maker
Most DAWs make it hard to quickly switch forth and back if you want to listen to mono over one speaker.
They all provide a mono mixdown out of the box, but the signal is sent to both channels (which is not true mono, it's phantom mono). So in most cases you'll have to head for the panning, which is too complicated if you don't have hardware buttons doing this job.
If you love true mono (and if you don't, you probably will): this plugin is for you. Feel free to donate if it helped you to improve your mix.
Download Free plugin here:
PA bx_solo
Brainworx created bx_solo to introduce users to the M/S technique for recording, mixing, or mastering. Key features of Brainworx´s famous M/S & Mastering products are included, like their unique Solo Buttons, which allow you to individually listen to all components of a stereo mix or stereo signal.
Download Free plugin here:
ValhallaSupermassive
has been designed from the ground up for MASSIVE delays and reverbs. Get ready for luscious clouds of reverb, otherworldly delays, and swelling waves of feedback unlike any you’ve heard before.
Supermassive has 21 out-of-this-world reverb/delay modes:
Download on this page - look for it on bottom of page