YourQuote - YourQuote is an interactive mobile app that helps you to write stories, quotes, screenplays, poems, and books.
AbiWord - AbiWord is a free software word processor.
JotterPad - JotterPad Writer for Android — Turn your thoughts into text. Go about your creative writing without distractions, write to your hearts content...
LibreOffice - Writer - Open-source cross-platform word processor.
Novelist - A portable writing assistant for novelists.
iA Writer - Minimal Design, Maximum Focus