Saber is a new FREE After Effects plug-in from Andrew Kramer and friends at Video Copilot.
After a few hiccups, the free filter is now available. VCP Saber can be used to create energy beams, lightsabers, lasers, portals, neon lights, electric, haze, etc. -- using the built-in beam, or using text or custom masks.
Saber is dense with features far beyond AE's ancient built-in Beam effect. There more info at Video Copilot or in Saber: a new FREE After Effects plug-in from Video Copilot.