Openshot

fast forward - L
Ctrl+End - jump to end
Ctrl+Home - jump to start
Right - Next Frame
Left - Previous Frame
Ctrl+Right - Next Marker
Ctrl+Left - Previous Marker
Shift+Left - Nudge left
Shift+Right - Nudge right
Space - Play pause / Up / Down / K
= - Zoom in
- - Zoom out

Keyframe

Insert

Remove

Clip

Position