Lekture is an application intended to ease the making of educational, screencast-based videos like the ones you can find on khan academy (http://khanacademy.org)
It provides a blackboard area where user can write on with color chalks. A "REC" button creates a video of the blackboard area with an audio track containing the teacher's explanations in sync.
Lekture is best used with the help of a wacom tablet, that provides pressure sensitivity and easy handwriting.
** DISCLAIMER **
Lekture is still on a very early stage of development: it's usable (at least for me), but some functionality is still not there, or may not work for some users with a set-up different from mine. Please, your comments, suggestions and bug reports are very welcome.
Wacom tablet support
*Updated:* Screen capture via Gstreamer (runtime dependency). Previously ffmpeg was used directly, but it had some drawbacks. For now only Gstreamer 0.10 is supported, as it's used via QtGstreamer and the latter isn't ported to Gstreamer 1.0 yet.
Fixed video presets: no complicated audio/video parameters
Blackboard snapshots load/save at any time