For those addicted to electronics...
[Vintage german modules] ANT, LAWO, Neumann, Siemens, TAB and Telefunken u, v and w modules
[Fairchild] Limiting Amplifiers Model 660 & 670
[Opto Comp] based on a sidechain by Fred Forsell
[DIY81] NEVEr something like ten81
[V372rack] Eledance's racked V372
[GDIY] The Lab where the knowledge is at
Expect more to come