What are some alternatives?
When comparing OpenGraphTool.com and OpenGraphTags, you can also consider the following products
MetaTagsTool.com - Meta Tag Analyzer, Simulator, & Generator
Majestic - Majestic - Link intelligence tools for SEO and Internet PR and Marketing. Site Explorer shows inbound link and site summary data.
MetaTagTool.com - Meta Tag & Open Graph Tag Generator, Simulator, & Analyzer
MetaTagTools.com - Meta Tag Analyzer and Generator
Open Site Explorer - Search engine for links Perform competitive website research.
SiteTools.co - Free SEO & Website Analysis Tools