The Tomu family also has;

- The Fomu (FPGA Tomu) - https://fomu.im/ and https://workshop.fomu.im/

- The Qomu (ARM+eFPGA Tomu) - https://tomu.im/qomu.html

- The Somu (Secure Tomu) - https://www.crowdsupply.com/solokeys/somu

The Fomu is also a great RISC-V MCU prototyping platform.