Fargo Alternatives

Tkoutline is a single pane, cross-platform outline editor written in Tcl/Tk .

TreeLine just stores almost any kind of information.

Extensible outliner and personal time organizer to manage todo lists, schedule tasks, remind events.

Dynalist is a web app that lets you break down and organize your thoughts in the format of lists.

Moo.do Application

A beautifully crafted outliner for your Mac:

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.

Plain text outliner with side-by-side views.

MemPad is a plain text outliner and note taking program with a structured index.

Todoist is a to-do list that helps you get organized, at work and in life.

Firstobject's free XML editor for Windows is called foxe.

The XMLSpy XML Editor is a powerful tool for editing XML and related technologies. It is the only XML Editor with patented SmartFix validation, enterprise-grade editors, converters, debuggers, and code generators.