LCOV
Swaks - Swiss Army Knife for SMTP
Software Unit Tests (Language Independent Approach)
Highly Customizable Test Data Generator
Regex Windows GUI app to help learn, create,& test Regular Expressions
OS-level test automation
Test suite for Linux audit and related security functionality
PyUnit and PyDev extensions for arbitrary Executables
A syslog message generator that replicates real syslog messages
(PEST)
Redhat Linux OVM System Performance Monitoring
Automated Test Framework