Hi !!
A friend of mine is the lead developer of a really good 2D animation software called tupí (available in repos since mageia 3). He has started a kickstarter campaign to raise some money to pay a developer for a year and reach the features needed for a 1.0 release.
If anyone is a user of this program and is interested on helping it, please check out the previous link and donate or help to spread the word about it, we will really appreciate it !!
Cheers,