Still offered as a free tool (with limited options), TimeToast.com allows users to add an unlimited number of events to their timelines. Each event is abbreviated with a title, picture and date - but when clicked, the event expands to include text and hyperlinks to outside websites!
My only "thumbs down" is to the non-collaborative nature of this tool. The Basic ($5.99/mo) and Pro ($8.99/mo) do offer collaboration, but even this is limited to a set number of users.