Scribus is a desktop publishing tool.
A mature application, it allows you to set up and layout text and images for print and web.
It can be used to prepare flyers, newsletters, report documents and even books for publication.
Scribus has a number of predefined templates, and additional inspiration can be found at scribus-templates.net .
Scribus can be found at scribus.net.

Delta Chat is a messaging application.
Where other applications usually use private proprietary networks, Delta exchanges messages by email; this means that you attach an email account to Delta and use that to send and receive messages.
The interface is close to that of Whatsapp.
Delta will exchange the file formats that the mail server supports. It uses Autocrypt to encrypt messages when possible.
It is available on desktop as well as mobile.
See delta.chat to learn more.

Shaarli is a PHP-based bookmark manager.
Shaarli let's you set link title, tag and annotate links and create media previews.
It has browser bookmarklets and mobile apps to access and create new bookmarks.
Links can be set to public or private requiring login.
Links can be shared by tag, so you can share all files tagged with a project.
Links are stored in a file, no database required.
Shaarli is available from github.com/shaarli/Shaarli and documentation from shaarli.readthedocs.io .

On the business end today:
is a punch clock-style time tracking application for the desktop by Graeme Gott.
The app allows for creating separate projects to track time for and create reports directly for invoicing.
The application is available at gottcode.org/kapow/ .

Diary is... well. I will let you have a guess before I tell you.
This Android app lets you write daily entries using Markdown. You can insert images as well.
By default, it will open in the reading mode so your Markdown is rendered as formatted text.
Data is stored in hierarchical folders along with the images, making it easy to back up or sync.
More on development on the Github page:
github.com/billthefarmer/diary
Diary is available through @fdroidorg:
f-droid.org/packages/org.billt

In the spirit of :
Bibisco is a tool to assist writers in creating the background of a story.
It will support the author in designing characters, locations and objects and flesh out scenes, chapters and overall structure.
There is a community edition as well a supporters' edition available.
See features, screenshots and a short presentation video on bibisco.com .

YOURLS is short for Your Own URL Shortener.
It is a set of PHP scripts that allows you to shorten URLs to a domain of your own.
Featuring a bookmarklet, advanced statistics and an easy interface, it is a mature tool accessible to more and less technical users alike.
It can be found on yourls.org .

Zettlr is a Markdown note editor.
It is developed as an academic took and allows imported for citation from Zotero.
It exports to many formats such as HTML5, OpenDocument, Office, PDF and others.
Zettlr is available here:
zettlr.com/

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