ActiveCollab has a few shortcuts to help you be more productive.
Quick Action Shortcuts
G + + - Add a default object for that page (eg. a new task on a Task page or invite a user on the People page)
G + / - Search
CMD + K - Quick jump
Go-To Shortcuts
G + 1 - Go to Projects
G + 2 - Go to My Work
G + 3 - Go to Activity
G + 4 - Go to Calendar
G + 5 - Go to People
G + 6 - Go to Invoices
G + 7 - Go to Estimates
G + 8 - Go to Reports
G + 9 - Go to Trash
G + 0 - Go to Add-Ons
Keyboard Compatibility
The shortcuts work best with English keyboard layouts. International layouts aren't supported (some shortcuts might not work).