Please se the online version of the emoji chest sheet.
A one pager listing the different emoji emoticons supported on Campfire, GitHub, Basecamp Next, Redbooth, Trac, Flowdock, Sprint.ly, Kandan, Textbox.io, Kippt, Redmine, JabbR, Trello, Hall, Plug.dj, Qiita, Zendesk, Ruby-China, Grove, Idobata, NodeBB Forums, Slack, Streamup, OrganisedMinds, Hackpad, Cryptbin, Kato, Reportedly, Cheerful Ghost, IRCCloud, Dashcube, MyVideoGameList, Subrosa, Sococo, Quip, And Bang, Bonusly, Discourse, Ello, & Twemoji Awesome.