Source Code Control Tools

The LabVIEW 8.6 help includes a list of SCC tools that integrate with LabVIEW's source code control interface: [1]

Perforce
Microsoft Visual SourceSafe
Microsoft Team System
MKS Source Integrity
IBM Rational ClearCase
Serena Version Manager (PVCS)
Seapine Surrond SCM
Borland StarTeam
Telelogic Synergy
PushOK (CVS and SVN plugins)
ionForge Evolution

In addition there are tools that a developer can use outside LabVIEW's source code control interface.
Tortoise SVN client to Subversion