Videoporama is an application you can use to create video presentations from pictures that runs on Linux and Windows. It comes with various transition effects, option to add sound to the video, many different presets and uses mplayer for previewing the slideshow before processing it. We've covered Videoporama in detail a while back so check out that post for more info: Videoporama: Create Cool Video Slideshows From Your Pictures.

Videoporama 0.8.1 was released a few days ago, adding a cool new feature that's not available in any other such Linux applications: you can now include videos too so it's not just an application to create videos from pictures anymore. You can also set the start / end position for a movie so if you only want to display a few seconds from a video in your montage, you can easily do it from the Videoporama options.

Masher is a website which lets you easily create a video by mashing together video clips, music tracks and photos - for free.

To create a good mashup, you need a nice collection of content and a way to combine everything together in the way that you want - and Masher will help you. You can use your own resources and/or combine with the ones provided by Masher which includes images, videos, music, effects and skins.

Wink is a Tutorial and Presentation creation software, primarily aimed at creating tutorials on how to use software (like a tutor for MS-Word/Excel etc) and the best part is that is freeware and runs on both Windows and Linux.

Using Wink you can capture screenshots, add explanations boxes, buttons, titles etc and generate a highly effective tutorial for your users.

sudo apt-get install wink