What are some alternatives?
When comparing OpenGraphTool.com and MetaTagTool.com, you can also consider the following products
OpenGraphTags - Open Graph Tag Simulator
MetaTagsTool.com - Meta Tag Analyzer, Simulator, & Generator
MetaTagTools.com - Meta Tag Analyzer and Generator
Majestic - Majestic - Link intelligence tools for SEO and Internet PR and Marketing. Site Explorer shows inbound link and site summary data.
Google - Google Search, also referred to as Google Web Search or simply Google, is a web search engine developed by Google. It is the most used search engine on the World Wide Web
Open Site Explorer - Search engine for links Perform competitive website research.