Notepad++ - A free source code editor which supports several programming languages running under the MS Windows environment.
productboard - Beautiful and powerful product management.
Notepad3 - Notepad3 is a fast and light-weight Scintilla-based text editor with syntax highlighting.
Aha! Business Model Builder - Create the perfect strategy for your product roadmap
TED Notepad - TED Notepad is a portable text editor software that deals with a large variety of text processing tools, supplemental text clipboards, high accessibility through hotkeys, and a customizable number of settings and options.
ConTEXT - ConTEXT is a small, fast, powerful and highly compact text editor for the Windows operating system.