Backup

• Acronis vmProtect (Free Trial)
• Altaro VM Backup (Free NFR License, 30 day trial can be found here)
• AppAssure
• Nakivo
• PHD Virtual Backup & Replication (Free Trial)
• Trilead (Free Download)
• Unitrends (Free Edition)
• Veeam Backup (Free Edition)
• Vembu (Free Edition)

BC/DR

• Unitrends (Free Trial)
• Zerto 

Cheat Sheets

• VMware Posters
• VMware vSphere 5 Memory Management and Monitoring diagram

Management

Clients

• Remote Desktop Manager (Free Trial)

Messaging

Microsoft Exchange

• Veeam Explorer (For Exchange)

Networking

Benchmarking

• Netperf

Check & Analysis

• Wireshark

Clients

• SSH Autoconnect vCenter Plug-in (by Ammesiah)
• puTTY
• FileZilla (Free)

Servers

• Solarwinds TFTP/SFTP Server (Free)
• TFTPD32 (Free)

TCP/IP Tools

• BitCricket IP Subnet Calculator

Storage

Benchmarking

• I/O Analyzer (VMware Labs)
• Iometer
• IOBlazer (VMware Labs)
• SQLIO (Microsoft)

Clients

• Veeam FastSCP

Disk Alignment check

• Aligned Vdisk Finder (by Ricky El-Qasem)

Disk Alignment fix

• UBERAlign (by Nicholas Weaver)

Virtual SAN/NAS

• FreeNAS (Free)
• NexentaStor (Free)
• StarWind iSCSI SAN & NAS
• StorMagic
• Openfiler (Free Edition)

Visio Stencils

• VMturbo (Free datacenter stencils for Microsoft Visio as well as for OmniGraffle)

Virtualization

Check & Analysis

• esxplot (VMware Fling)
• RVTools (by Rob de Veij)
• VMware Compliance Checker (registration required)
• VM Resource and Availability Service (VMware Fling)

Deployment

• Auto Deploy GUI (VMware Fling)
• ESXi-Customizer (by Andreas Peetz)

Management

• Auto Deploy GUI (VMware Fling)
• Embotics V-Commander
• ESXi Embedded Host Client (VMware Fling)
• PowerGUI & VMware Community PowerPack
• vmClient (by NTpro.nl)
• VMTurbo – Operations Manager (30 day trial)
• VMware vSphere CLI
• VMware vSphere PowerCLI
• Xangati for vSphere

Monitoring & Reporting

• Opvizor
• Quest vFoglight (Free Edition)
• vCenter 5.1 pre-install check (VMware Fling)
• Veeam ONE (Free Edition)
• VisualEsxtop (VMware Fling)
• VMTurbo – Virtual Health Monitor
• VMTurbo – Excel Templates for IT budgeting (free)
• vSphere Mini Monitor (by Nicholas Weaver)
• vOPS Server Explorer (Free Edition)

P2V / V2V Tools

• 5nine Easy Converter (Free Edition)
• BatchV2V (VMware Fling)
• PlateSpin Migrate
• vCenter Server to vCenter Server Appliance Converter (VMware Fling)
• VMware Converter Standalone