The Treeview Plugin

This plugin allows you to browse through your inventory via a tree view in a panel located on the left side of the screen. You can browse the tree of your site to see the equipment.

Tip 0.71.x

This has been incorporated in 0.72 (see user preferences)

For those who wish to make the tree appear automatically when connected, just change login.php (in glpi /) by replacing the last line:
glpi_header($CFG_GLPI['root_doc'] . "/front/central.php$REDIRECT");
with:
glpi_header($CFG_GLPI['root_doc'] . "/plugins/treeview/index.php$REDIRECT");

Once logged in, GLPI will automatically launch treeview.

Debug for version 1.6.1 (GLPI >= 0.83.3)

In core file html.class, change

header('x-frame-options:DENY'); by header('x-frame-options:SAMEORIGIN');