Joplin

A note taking and to-do app with sync between Linux, macOS, Windows, and mobile

Xed-Editor

Advanced Text Editor for Power Users

SimpleTextEditor

Simple Text Editor

LibreOffice & OpenOffice document reader | ODF

Document reader & file editor for Libreoffice & OpenOffice | ODF: ODT, ODS +more

neutriNote CE

A hub of written thoughts in fast searchable plain text

Acode editor - Android code editor

A lightweight but powerful text/code editor.

App Manager

A fully-featured package manager for android.

SimpleMarkdown

A simple markdown editor

Squircle CE - Code Editor

Fast and powerful code editor & file manager for over 30 programming languages

Markor

Text editor - Notes & ToDo. Lightweight. Markdown and todo.txt support.

Emacs

The extensible self-documenting text editor

Material Files

Open source Material Design file manager

Editor

Simple generic text editor

Amaze

An open-source file manager following the Material Design guidelines

VIMTouch

Text editor