EssentialPIM Free makes extensive use of shortcuts. Here is the list of them:

Switching Between modules:

Ctrl+0 EPIM Today

Ctrl+1 Schedule

Ctrl+2 To Do

Ctrl+3 Notes

Ctrl+4 Contacts

Database operations:

Ctrl+N New Database

Ctrl+O Open Database

Ctrl+S Save changes or New Database

Ctrl+P Print

In each module:

Ins Adding new element

Del Deleting the element

In Schedule:

Ctrl+D Day View

Ctrl+W Week View

Ctrl+M Month View

Ctrl+Y Year View

In Notes:

while creating a new Note

Ctrl+D insert current Day

Ctrl+T insert current Time

In text editing standard shortcuts are enabled: Ctrl+X, Ctrl+C, Ctrl+V, Ctrl+Y, Ctrl+A.

Minimize to system try+ can be changed. By default: Ctrl+Alt+S.