Zed is a fully offline-capable text and code editor you can use to edit files locally, on Dropbox, or remotely on any server. It has all the code editor features you'd expect and more:

Pluma, fork of gedit , is a text editor part of MATE Desktop Environment. It supports most standard editor features, extending this basic functionality with other features not usually found in simple text...

Textadept is a fast, minimalist, and ridiculously extensible cross-platform text editor for programmers. Written in a combination of C and Lua and relentlessly optimized for speed and minimalism over the years, Textadept is an ideal editor for programmers who want endless...

Light Table is a new interactive IDE that lets you modify running programs and embed anything from websites to games. It provides the real time feedback we need to not only answer questions about our code, but to understand how our programs really work.

ReText is a simple text editor for Markdown and reStructuredText documents with syntax highlighting and optional live preview.

Vim inspired text editor with support for multiple selections and scores of other "out of the box" features.

Haroopad is a markdown enabled document processor for creating web-friendly documents. You can author various formats of documents such as blog article, slide, presentation, report, and e-mail as if experts did.