Paralan
- Manufactures extenders and converters for LVD/MSE, HVD and SE SCSI also includes Fiber Optic, ASICs design and cables.
- http://www.paralan.com/

Second Wave, Inc.
- Marketing the SCUSBee, a USB-to-SCSI port interface allowing iMac, iBook, and G3 to utilize SCSI devices.
- http://www.2ndwave.com/

Optisys
- SCSI device drivers and NAS servers for optical, CD-ROM, RAID, PD and DVD mass storage devices.
- http://www.optisys.com/

Rancho Technology
- Design and manufacture single to differential-ended converters and SCSI bus extenders. Includes Ultra2 LVD SCSI, Ultra160 SCSI, and Ultra4. Specializing in custom (OEM) solutions.
- http://www.rancho.com/