OCExaminer - Medical Billing
GNU Health - GNU Health is a Free/Libre project for health practitioners, health institutions and governments.
XIFIN RPM - XIFIN RPM manages and automates medical claims filing, reduces the risks associated with regulatory compliance, and provides visibility.
Kareo - Kareo - Go Practice | Medical Office Software for Small Practices
EDIinsight - EDIinsight software enables users to track transaction in real-time, customize claim edits, create secondary claims, & manage claim workflow
OpenMRS - OpenMRS is a community-developed, open source, enterprise electronic medical record system platform.