Discourse Gamification Plugin in de Header

[merefield (Robert)]

This supports just below header and Topic Route too

Discourse Bars (a sidebar framework)

Overview A Theme Component that allows you to lay out Components (“widgets*”) on top and side bars Specify a set of “widgets” distinctly for Route and Position. Supports setups for each of: discovery[1], topic, tag[2], category[2:1], categories[2:2] or the new custom homepage![3] “Bars” can be either: top, left, right OR alternative right location. Each bar can be collapsed or dismissed (refresh browser to reset dismiss). Handles the Official Sidebar, but if you intend you use a …

But you might need to build the Component yourself.