1. GrenderGo package for easily rendering JSON/XML data and HTML templates
2. Plugin EndpointsRegister URL endpoints for which only certain WordPress plugins are enabled.
4. Wp Plugin ProfilerBasic profiler for WordPress plugins. Measures response times with and without a given plugin activated.
6. AltorouterPHP routing class. Lightweight yet flexible. Supports REST, dynamic and reversed routing.
7. Php RouterSimple PHP Router class (supports REST and reverse routing)
8. extemplateWrapper package for Go's template/html to allow for easy file-based template inheritance.
9. vatGo package for dealing with EU VAT. Does VAT number validation & rates retrieval.