There have been various efforts from EDA companies e.g. Cadence and Mentor Graphics on verification IPs and I had been using Cadence VIPs. Synopsys too acquired nSys and started a chapter in this domain.
Synopsys's community site for Verification IPs online resources and blogs -
http://www.vip-central.org/
VIP-Central.org is an industry-wide community site for system-on-chip (SoC) verification engineers and users of verification IP (VIP). The site provides a centralized online resource of relevant forums and blogs focused on verification of industry-standard protocols. VIP-Central.org is the go-to source for the latest technical information and discussions on the use of verification IP and advanced verification methodologies to verify protocol-based IP as well as IP integration, SoC sub-systems and full SoCs. VIP-Central.org aggregates information from industry experts across the verification community, providing best practices and ideas for better verification performance, protocol debug, methodology, verification planning, coverage management and ease-of-use.
source : http://www.vip-central.org/
Mentor Graphics's community site -
http://verificationacademy.com/
"Mentor Graphics' Verification Academy is a first of its kind—unlike anything in the industry.
Its goals are to provide the skills necessary to mature an organization’s advanced functional
verification process capabilities. To this end, the Verification Academy provides a methodological
bridge between high-level value propositions (related to advanced verification technology) and the
low-level details (related to specific tool and verification language details)."
source : http://verificationacademy.com/
