A comprehensive list of rejection messages which you should avoid to get your WordPress theme approved quickly in Themeforest
Themeforest WordPress theme development workflow
Theme Mentor For Themeforest - helper plugin for themeforest WordPress Themes , the cousin of Theme-Check reporting other possible theme issues
This library provides developers to ask end user to review their product (theme / plugin)
Elite Admin
Themeforest clone to build your marketplace now! Themeforest clone is a pre-built software solution designed similar to core functionalities and features of the renowned Themeforest digital marketplace.
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