After seeing the wild array of features of the 4ms Spherical Wavetable Navigator, you might be a little underwhelmed by the Wav Recorder and the Listen Two and Four. However these are both super useful utility modules that could fit well in any system.
The Wav Recorder is a super simple high quality stereo audio recorder in your eurorack case. The best thing about this is that you can avoid any grounding or hum issues introduced when taking modular signal out and into a regular audio interface...
The Listen Two, Four and Four 1/4 are the perfect mixing/output utilities with some great chaining abilities to vastly improve your mixing capabilities in the modular.
More info at 4ms Company