I gave a "Why Ruby on Rails?" presentation to the Orlando Ruby Users Group. I've given Introduction to Rails talks before, so I tried to shake this one up and make it as ranty and opinionated as possible (It's more entertaining that way).

The screencast is meant to be an introduction to OPML (what it is) and then goes into a number of different uses and applications (what it can do - not exhaustive by any means), but hopefully something there for you too if you are already familiar with OPML

Using the Web 2.0 write up in Wikipedia this video is to help teach educators about Web 2.0 tools

The following is an Introduction to Subversion screencast. It is targeted mainly at those who are new to version control, covering the conceptual ideas...

This screencast is an introduction to MochiKit 1.1, using the interactive interpreter example as a conduit for showing off concepts from each MochiKit module

Ray Camden gives us a lightweight introduction to Apollo, with some demos and code.

In this session from webDU, Mike Chambers gives an overview of Apollo, shows how to build your first Apollo application, and shows how to convert an existing Flex based application to an Apollo application in under 5 minutes.

This is the first of several screencasts focusing on the LaTeX bundle. Recorded and narrated by Charilaos Skiadas.

These three videos show how objects are used in Python. You can write a lot of code without being especially aware of objects -- until you come to GUI ...

Want or need to deal with Perl scripts? Here's the introduction to the Perl programming language you've been looking for. This ShowMeDo series teaches ...

Join Chinmoy Gavini as he takes you through the early stages of Ruby programming.