Stacks to create engagement?

Anyone have favorite stacks / recommendations for . . . .

–a stack to incorporate chat directly into the site? I’d like to have a big “chat now” button, where someone could instantly message me or a staff member.

–a “share this page via email” stack? I’d like to create a button that could be positioned prominently on a site’s home page.

Please, no double post. Most here are also on the other forum.


Thanks Geoff! Tawk looks great.