for the best 4e tool there is, and actually FREE go heremasterplan.habitualindolence.net/
here are some more links
VIRTUAL TABLETOP (VT) PROGRAMS FOR RPGs
Below are links to every virtual tabletop program I could find, both free and commercial, so you can judge for yourself which tool best fits your needs.
Battlegrounds: RPG Edition
That's what the rest of this site is about. I'm just including BRPG to make the list complete.
Windows-only. Many people like the look and feel of this app, and the 3D dice rolling.
Java-based. Steep learning curve, but powerful.
Java-based, 2-week free trial license.
Only the GM must pay. Players play free, using their web browser. The GM app is Windows-only. A Lite version is available for free.
No longer developed, but a number of people still use it and there seems to be a user community that supports it.
iTabletop Pandoren (v2)
Browser-based (requires MS Silverlight, Adobe Flash, and 1 GB RAM) Windows or Mac OS X. Features built-in voice chat, and streaming video/webcam support.
Windows-only. Not yet released. Alpha release planned for sometime in 2010.
D&D Game Table
Windows-only. Subscription-based. Not yet released.
Update: The link below no longer works, since the Game Table is either cancelled or indefinitely postponed (depending on who you ask).
Mac OS X-only (v10.5.8 or greater). No online play in v1.0.
Subscription-based. Features built-in webcam and voice chat.
Runs in browser. Subscription-based.
Probably has the biggest user base of any VT app.
This site hosts the development version of OpenRPG.
Java-based. Developers are actively enhancing this program regularly.
Online Pen & Paper World
Tri Axe Dungeons & Dragons Chat Interactive Dungeon
Dave's Flash Mapper
Possibly still in development.
Windows-only server, Windows and Mac clients.
BYOND Tabletop Gaming
Presumably still in development, but no updates since August 2005.
Windows-only. v2.0 is in development, and screenshots for it are now available.
Windows-only. The site is no longer available.
Linux-only. Not for the technically-challenged.
Battle Map v2.0
Flash-based, runs in your browser.
Runs in your browser.
Windows & Mac OS X. In French.
Windows-only. Note that the link below is a download link, not a website.
Virtual Game Table (VGT)
Irony Games' MapMagical Encounter Editor
Java-based, runs in a web browser.
Map Maker (beta)
MS Silverlight app, runs in a web browser.
Runs in a web browser.
Runs in a web browser.
Windows-only. No online component
Unclear whether this is free for good, or free while-in-beta.
Windows & Mac OS; has video-conferencing feature.
Unclear whether this will free when released, or just while-in-beta.
Will supposedly be a 3D VTT.
Not even alpha yet.
Will support RPGs and boardgames