I shared this list and demo of each to the PDX VMUG on 11/2/2010. These are my favorites - what are yours?
#1 - Twitter
#2 - VMware VMTN Forums
#3 - The VESI
#4 - RVTools
#5 - VMA (vSphere Management Assistant)
#6 - William Lam's free vGhetto Script
http://communities.vmware.com/docs/DOC-9852
#7 - Veeam Monitor
#8 - ESXPLOT
#9 - VMTurbo
#10 - vSphere-Land
http://vsphere-land.com
Other Tools:
Zenoss and ESXTop
http://www.zenoss.com/about/news/Zenoss_Announces_Free_Tool_for_VMware_Power_Users_with_Esxtop.html
Kendrick Coleman’s Free VM Tools ISO:
http://www.kendrickcoleman.com/index.php?/Tech-Blog/vm-advanced-iso-free-tools-for-advanced-tasks.ht...
Planet-V12N Blog Aggregator
http://www.vmware.com/vmtn/planet/v12n/
VMM for Microsoft SCOM
http://technet.microsoft.com/en-us/magazine/2008.10.vmm.aspx
VIOPS Proven Practices
http://communities.vmware.com/community/viops
PDX VMUG Group on LinkedIn
http://www.linkedin.com/groups?mostPopular=&gid=2033493
Lunches with your fellow virtualization geeks
http://www.foodcartsportland.com/