VMware
VMware Product Interoperability Matrices:
https://www.vmware.com/resources/compatibility/sim/interop_matrix.php
VMware Education:
https://mylearn.vmware.com/mgrreg/index.cfm
VMware Fling:
https://labs.vmware.com/flings
VMware Hand on Labs:
VMware Configuration Maximums:
https://configmax.vmware.com/home
Tools
RVTools
https://www.robware.net/rvtools/
vCheck for vSphere
https://github.com/alanrenouf/vCheck-vSphere