Summercad

SmartLock
Trial versionSmartLock: Secure Your AutoCAD Designs Effectively
Windows
Non-deletableWatermark
FreeAdd Permanent, Non-Deletable Watermarks to AutoCAD Drawings
Windows
SmartSignSafety Visual Digital Signature For AutoCAD
Trial versionSecure Your CAD Drawings With Visual Digital Signatures
Windows
SmartLock - CAD Batch Lock (Type B)
Trial versionSmartLock-B: Secure Your AutoCAD Designs with Ease
Windows
DeDynamicBlock
FreeConvert dynamic block in the drawing to static block, and removes other dynamic states in blocks.
Windows