General Resources
Microsoft Unified Communications Open Interoperability Program
Lync Server Downloads and Updates
Training Resources
Lync Conf 2014 Material (Channel 9)
TechNet
TechNet: Lync Server Technical Diagrams
TechNet: Lync Server Deployment
TechNet: Lync Server Migration
TechNet: Lync Server Operations
TechNet: Lync Server Management Shell
Tools
Lync Connectivity Analyser (32-bit)
Lync Connectivity Analyser (64-bit)
Lync Server 2013 Best Practice Analyser
Lync Server 2013 Debugging Tools
Lync Server 2013 Management Pack
Lync Server 2013 Persistent Chat Resource Kit
Lync Server 2013 Planning Tool
Lync Server 2013 Resource Kit Tools
Lync Server 2013 Stress and Performance Testing Tool
Lync Server 2013 Whiteboard Archiving Viewer
Lync 2013 Rollout and Adoption Success Kit
Lync Server Software Development Toolkit
Lync Server 2013 Administrative Templates