Monokai JSON+ - Sublime Monokai Theme for JSON.
CKEditor - Real-time collaborative future-ready rich text editor
Power JSON Editor - Power JSON Editor is a JSON editor for developers with Visual Tree View and multiple plugins like Array Table Editor and jq Processor, also with format converter plugins, it is easy to convert files between JSON, PLIST, YAML and TOML.
TinyMCE - TinyMCE is a content editor that functions as a plug-in for Wordpress websites.
FundaMine - Get Medium style annotations on your site
Quill - Powerful, API-driven rich text editor