What are all the third party (unofficial) accessories I can get for an NXT

Question

Similar to this question but I'd like to know about 3rd Party/aftermarket options instead please.

I've heard about motor multiplexers and the like but are there others, i.e. more sensitive colour detectors etc.?

Answer 1

There are MANY companies that offer third party stuff for NXT:

• Mindsensors, already mentionned in pcantin's answer
  • Vision Subsystem - Capable of tracking up to 8 coloured objects
  • Touch Panel
  • Numeric Pad
  • IR Obstacle Detector
  • Sony PS2 Controller Interface
  • Line Sensor Array
  • Accelerometer
  • Realtime Clock
  • Power Meter
  • IR Distance Sensors (Long/mid/short range)
  • Multiplexers for motors and sensors
  • Linear Actuators
• HiTechnic
  • LEGO Certified Products, listed in the official answer.
• Dexter Industries
  • Wifi Sensor - a wifi connection for the NXT
  • Inertial Motion Sensor - Acceleration, tilt and angular velocity
  • Thermal IR Sensor - Reads surface temperatures
  • Digi XBee Radio - Long distance radio communications
  • GPS
  • Solar panels
• Firgelli Industries
  • Linear Actuators
• Rotacaster
  • Omni Directional Wheels
• Microinfinity
  • Inertial Motion Sensor - Acceleration, tilt, angular velocity and tracks relative position
• Codatex
  • RFID Sensor and transponders
• Nullspace
  • IO Expansion
• Vernier
  • Sensor Adapter - Allows access to over 30 Vernier sensors
• Generation Robots
  • POB-Bridge - Allows access to the POB sensors and accessories
  • Reseller of other sensors mentioned above
• Trossen Robotics
  • Reseller of other sensors mentioned above

... and I'm pretty sure I forget several!