A 4 LFO module from NOH Modular. Actually 8, since each LFO set outputs a triangle and a square wave (why no sine?) at the same time. Also, you can mix two LFOs together, creating interesting waveforms, and their’s a DAC to sum out on/off signals based on the edge state of the 4 LFOs.
Simple build, all SMD already installed. Would be a good first build.