Bluegate – IT outsourcing (publicly traded BGAT.OB)

Datalign – Hospital Data integration

Macro Enterprises – Medical Software Development and Consulting

Patriot Managed Care Solutions – Payor applications

Practice Insight – EDI systems

Prognosis Solutions – CCHIT certified EHR vendor

Smart Imaging – 3D imaging

SynSeer – Open Source Medical Software

Spring Medical – CCHIT certified EHR vendor

Swearingen Software – RIS

Telemedicus – Emergency response communications technology (publicly traded TMDI.PK)

Truewater – Health IT consulting (shameless self-promotion note: employees HITinHouston author Fred Trotter)