We’ve all seen Hollywood movies where a high ranking general gains entry into the top secret bunker beneath a mountain by speaking into a microphone and having the computer scan the timbre of his voice to confirm it’s really him.

Whether it’s for a presentation or walking someone through a complicated process, there’s nothing as visceral as seeing a task carried out by a user as he or she does it, and Camtasia lets you share the experience with anyone.

Aperture 2 is a cataloguing and adjustment tool for large collections of digital photos that’s geared more towards pro photographers. However, if you aspire to the profession or just take a lot of pictures, it does a similar job to Picasa or iPhoto — even though it’s like comparing a VW beetle to an Aston Martin.