What you see is what you get:
Green: Slew limiter / portamento / glide. It limits the speed of change. It has a switch to limit up/down/both.
White: Dual passive AND-wired sockets. A double 2-input, 1-output passive AND gate. If both of the inputs are high, the output is high. See Doepfer DIY on how to make this module.
Blue: Passive multiple, like the Doepfer A-180. Use this double 4-fold multiples to split some signal and route them to multiple destinations. For sensitive applications like a VCO a buffered multiple is recommended.
The front faces are 3d printed, models can be found at my Eurorack module thing at Thingiverse.