It's an excellent choice for those that have to provide technical support or developer who have to design tutorials to explain how to use their programs. The range of output files is admittedly limited - CamStudio will only output in AVI format but you can also convert movies to Flash (SWF). You can also choose the codecs used to encode your screen capture shots and set the frame rate you need to capture at.

Finishing tools: Once you have your screen capture recording the way you want it, you can utilize the various tools included in the program to make your video complete. These include multiple Transition Options, Voice Narration, a Zoom and Pan effect, Cursor Effects, Captions, Quizzing, and more. You can also use built-in tools to enhance and improve the audio quality of your voice recording.
Adobe Spark Video offers a free online slideshow maker with music and transition effects. Use this powerful picture slideshow maker to compose a unique presentation by adding different backgrounds, photos, videos and voice content. Play around with a variety of customization options, so you can create something your audience has never seen before. Templates, themes, and fonts come in an assortment of styles to suit your creative vision. Upload your own images or video clips, or insert free photos and icons from the stock library. Top it off with music for a fun-filled slideshow you’ll want to share with all your friends and family!

Expression Encoder 4 is the latest version of the screencast software by Microsoft for Windows-based systems. With Expression Encoder 4, you can record a screencast of your screen activity while simultaneously capturing the webcam video and audio narration from a microphone. Alternatively, you could also capture screen activity first and later add a voiceover, using its Audio Overlay feature.
CamStudio is a great tool to create quick demos and screencasts on your computer in AVI and, if you wish, you can convert them into Flash format. CamStudio's features include options to highlight the cursor path during a recording session, automatic panning, and the ability to record with sound. An effects menu lets you annotate and append videos with comments, plus add a time stamp or watermark. CamStudio also captures screenshots if you set the frame rate, drag the mouse over the area for capture, and tap on the coordinates. While CamStudio doesn’t contain any fancy compressors, file types, or even a video editor, we found it easy to convert AVI files into MP4s, for example, using other free software free software. Overall, CamStudio is a great way to take advantage of open source software to produce both instructional videos and screen captures and share them with the world!