1. Roche 454 GSFLX[
http://www.454.com/
]
2. Illumina[
http://www.illumina.com/
]
3. SOLiD[
http://www3.appliedbiosystems.com/AB_Home/applicationstechnologies/SOLiDSystemSequencing/index.htm
]
4. Helicos[
http://www.helicosbio.com/
]
5. The Polonator[
http://www.polonator.org/
]