The Talent Point Planner allows you to plan how to spend your character's future talent points (hence the name).  Bound to the <alt-shift-g> key by default [which can be changed in the usual manner], the planner makes a temporary copy of your character, levels it up to level 50, and opens the level-up dialog for you to set up your point plan.  When you're finished, the plan will be saved and displayed as annotations in the regular level-up dialog.

Also available as part of the ZOmnibus Addon Pack and ZOmnibus Lite.

Frequently Asked Questions:

• The planner isn't letting me include a talent point source that I know about.