Contiki is a living thing. Platforms are added and removed. This is a list of platforms that once was in the tree but that was subsequently removed.

• esb: this was a custom MSP430-based platform that was one of the early MSP430-based Contiki platforms and had a fairly substantial support in Contiki such as its own Cooja emulation platform. Removed after Contiki 2.7. Last revision containing the platform.
• jcreate: this was a MSP430-based platform that was similar to the sky platform, but with a nice form factor and a plastic casing which made it easy to handle. Removed after Contiki 2.7. Last revision containing the platform.
• msb430: a custom MSP430-based platform. Removed after Contiki 2.7. Last revision containing the platform.
• pc-6001: one of the homecomputer platforms, based on the z80. Removed after Contiki 2.7. Last revision containing the platform.
• redbee-dev and redbee-econotag: precursors to the econotag. Removed after Contiki 2.7. Last revision containing the platform.
• sentilla-usb: a relative to the jcreate platform, a USB-device that had a MSP430 and a CC2420 radio. Removed after Contiki 2.7. Last revision containing the platform.
• stepper-robot: an Arm-based platform with a custom built hardware. Removed after Contiki 2.7. Last revision containing the platform.
• stk500 and stk501: AVR-based platforms. Removed after Contiki 2.7 Last revision containing the platform.
• iris: ATmega1281-based platform from MEMSIC. Removed after Contiki 2.7 Last revision containing the platform.

The code for these platforms are still present in old releases and their code history can be traced using the Contiki git.