Notepad++ - A free source code editor which supports several programming languages running under the MS Windows environment.

Schema App - Schema App empowers the Digital Marketer to own their schema markup strategy through to implementation without ever writing code.

Sublime Text - Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features. Fully customizable with macros, and syntax highlighting for most major languages.

UpSeo - UpSeo is a best-in-class website traffic generator, allowing you to get more potential visitors to your website and enhance conversions.

Notepadqq - Notepadqq is a linux clone (identical application) of Notepad++

Link Research Tools - Recover, Protect, Learn and Grow your SEO with LRT.