SciTE
Notepad++
Sublime Text
Atom
GNOME
Visual Studio Code
Geany
Notepad2
Product HQ
productboard
ConTEXT
Aha! Business Model Builder
ProductFlare
Linear Release Roadmaps
Changelogfy
Product Roadmap Builder by ProdPad
SciTE Product HQNotepad++ - A free source code editor which supports several programming languages running under the MS Windows environment.
productboard - Beautiful and powerful product management.
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.
ConTEXT - ConTEXT is a small, fast, powerful and highly compact text editor for the Windows operating system.
Atom - At GitHub, we’re building the text editor we’ve always wanted: hackable to the core, but approachable on the first day without ever touching a config file. We can’t wait to see what you build with it.
Aha! Business Model Builder - Create the perfect strategy for your product roadmap