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.
Dubsado - Dubsado is flexible — it gives you 5 (now 6!) ways to add new leads. Best of all, 5 ways are automated.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft
Harlow - Harlow helps freelancers get organized, save time, and look professional with automated invoicing, proposal templates, and much more—all from one centralized hub.
Vim - Highly configurable text editor built to enable efficient text editing
Hecticapp.com - Hectic is a single digital workspace with all the tools needed to start, manage and grow a freelancing business, with a built-in personalized community to help freelancers connect with others, develop and refine their craft and get help from experts.