xTimeline has been a decent timeline-making web tool, though I don’t think it’s been the best or most accessible one for English Language Learners. However, they’ve just released a new version that might have fixed some of their shortcomings.

A post in the Mashable blog gives a pretty good summary of xTimeline’s changes.

You can find a link to xTimeline, and many other online timeline applications, on my website under Student Timelines.