Windows

General
Ctrl+, Preferences
Ctrl+Z Undo
Ctrl+Shift+Z Redo
Session Controls
Ctrl+O Open a session
Ctrl+S Save a session
Ctrl+Shift+S Save session as...
Ctrl+Q Quit cineSync
Ctrl+W Close window
Playlist Controls
Ctrl+Shift+A Add media files to the Playlist
Ctrl+Shift+F Add a folder (and sub-folders) to the Playlist
Ctrl+Shift+L Organise the Playlist
Ctrl+B Buddy list
Drawing Controls
Alt+A Save the current frame
Ctrl+D Save and clear the current frame
Ctrl+E Clear the drawings on the current frame
Ctrl+1 Pencil drawing tool
Ctrl+2 Arrow drawing tool
Ctrl+3 Circle drawing tool
Ctrl+4 Text box tool
Ctrl+5 Zoom tool
Ctrl+6 Eraser
Alt+C Change your drawing colour
Alt+T Change the colour of the text in your text boxes
Notes
N Add note to current frame
Ctrl+K Show a list of notes / Annotations in the Playlist
Navigation
J Play media in reverse (press twice for double speed)
K Pause / Stop the media
L Play media forwards (press twice for double speed)
Space bar Play / Pause the media
G Go To...
Ctrl+< Jump to previous marker
Ctrl+> Jump to next marker
Page Up Previous media in Playlist
Page Down Next media in Playlist
Shift+Page Up Previous media in the timeline in Play all
Shift+Page Down Next media in the timeline in Play all
Ctrl+L Toggle looping the media
<
Step backwards (one frame, hold down for more)
> Step forwards (one frame, hold down for more)
Ctrl+T Play section only
I Set In point
O Set Out point
C Clear In / Out points
Viewing
Alt+1 Half size
Alt+2 Actual size
Alt+3 Double size
Alt+4 Fit to screen
I Set In point
O Set Out point
C Clear 'In/Out' points
Ctrl+0 Zoom to fit
Ctrl+= Zoom in
Ctrl+- Zoom out
Ctrl+F Full screen mode
Alt+F Stereo full screen mode
Additional Tools
Alt+M Masking panel
Alt+G Colour grading panel
Ctrl+I Movie Inspector

Mac OS X

General
(Apple)+, Preferences
(Apple)+Z Undo
(Apple)+Shift+Z Redo
Session Controls
(Apple)+O Open a session
(Apple)+S Save a session
(Apple)+Shift+S Save session as...
(Apple)+Q Quit cineSync
(Apple)+W Close window
Playlist Controls
(Apple)+Shift+A Add media files to the Playlist
(Apple)+Shift+F Add a folder (and sub-folders) to the Playlist
(Apple)+Shift+L Organise the Playlist
(Apple)+B Buddy list
Drawing Controls
Alt+A Save the current frame
(Apple)+D Save and clear the current frame
(Apple)+E Clear the drawings on the current frame
Option+1 Pencil drawing tool
Option+2 Arrow drawing tool
Option+3 Circle drawing tool
Option+4 Text box tool
Option+5 Zoom tool
Option+6 Eraser
Option+C Change your drawing colour
Option+T Change the colour of the text in your text boxes
Notes

N
Add notes to current frame
(Apple)+K Show a list of markers in the Playlist
Navigation
J Play media in reverse (press twice for double speed)
K Pause / Stop the media
L Play media forwards (press twice for double speed)
Space bar Play / Pause the media
G Go To...
(Apple)+< Jump to previous marker
(Apple)+> Jump to next marker
Page Up Previous media in Playlist
Page Down Next media in Playlist
(Apple)+Page Up Previous media in the timeline in Play all
(Apple)+Page Down Next media in the timeline in Play all
(Apple)+L Toggle looping the media
< Step backwards (one frame, hold down for more)
> Step forwards (one frame, hold down for more)
(Apple)+L Play section only
I Set In point
O Set Out point
C Clear In / Out points
Viewing
(Apple)+1 Half size
(Apple)+2 Actual size
(Apple)+3 Double size
(Apple)+4 Fit to screen
(Apple)+0 Zoom to fit
(Apple)+= Zoom in
(Apple)+- Zoom out
(Apple)+F Full screen mode
Additional Tools
Option+M Masking panel
Option+G Colour grading panel
Ctrl+I Movie Inspector