What are some alternatives?
When comparing MetaTagTools.com and SEOmator, you can also consider the following products
MetaTagsTool.com - Meta Tag Analyzer, Simulator, & Generator
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
OpenGraphTool.com - Open Graph Checker Tool
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
OpenGraphTags - Open Graph Tag Simulator
Raven - Use Raven to create fully scalable vector art appropriate for logos or tee shirt designs.