Kerbal Flight Indicators
Draws a couple of markers directly in your field of view. It shows
Horizon
Attitude
Velocity
Vertical direction
You can turn it on/off with the toolbar button.
Download
Release Page on GitHub
(Source code on Github)
Installation: Extract the contents of the zip file into the GameData directory.
Configuration:
Is done by editing settings.cfg in GameData\KerbalFlightIndicators\Plugins\PluginData\KerbalFligh