Someone asked me to recommend a cartoon animation software, and I had a play about with this software late last year on ubuntu, so could recommend this. The software is called Pencil, it allows you do some great 2D animation either with bitmap or vector images and then can be saved in various formats.
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It is available for linux, windows and macs, I’ve been using it on ubuntu 9.10 unr and on windows 7 with no problems, if you download pc version it is a zip file just copy the files to a directory on your pc and run or create a shortcut from there.
And best of all this is free, though you can donate to the developer, I’m not associated with the software just thought would pass the information on. Though if anyone can recommend any other cartoon animation software, your comments are welcome.
Goto the following website to download: http://www.pencil-animation.org/