I love Articulate. However, if you are concerned with the compliance of Flash for Section 508, you might consider using SoftChalk. Softchalk just came out with some mobile activities.
We also use Moodle platform for LMS. Haven’t done much social media integration other than just adding the feeds into a block in the Moodle. One issue we have internally, not a lot of employees are using social media at work (State Government).
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