The Nexus Mod Manager allows you to download, install, and manage your mods.

a free and open source piece 

Create a graphical chart of your ideas for projects.

lets you create a tree structure 

Visualize and manage your Git and Mercurial repositories.

SourceTree lets you visualize and manage your Git repositories from a graphical interface. It lets you review change-sets, stash, cherry-pick between branches 

Edit, analyze and manage source code written in various programming languages.

a window that shows a tree structure...as consulting other sources. Source Insight...hierarchies, call trees, and reference trees. Fortunately 

Convert Flash projectors and SWF to FLA editable files.

in which the source code...file, organized in a tree structure according 

Simple yet efficient DVD creation tool for your video clips and home recordings.

and subtitles. The “Source” section...comes with a menu tree structure 

TotalDocConverter can convert between various document formats.

allows combining various source documents...browse the folder tree to pick 

IT helps to create, keep organized connection scripts written on TeraTerm Macro.

in the Connection Tree -Supports unlimited*...operations on Connection Tree nodes -Contains...Supports Connection Tree branch...without the source code 

Research, organize, and share your family history.

notes and unlimited source citations 

File Commander is a 32 bit text mode file manager.

may serve as source...to view a directory tree, drive statistics...usage of a directory tree. -Tree views for quick