Apply several expressions to a property such that each expression is active only for a certain period of time. Instead of an abrupt change between the expressions you can also smoothly transition from one expression to the next. Furthermore, you can specify time intervals in which no expression is active such that the keyframed motion is considered.

Sequences the selected layers from the current composition time, by offsetting their inpoint.

Shifts or staggers selected layers in time by a user defined number of frames or seconds.

This script displays a palette with controls for jumping to different times in the composition. There are buttons for jumping a specific number of frames forward or back from the current time, as well as 7 favorite buttons for capturing different times (set from the current time) and jumping to them easily.