Wildly different keystroke bindings

Here's the first on my list:

This is not specific to Linux (many other Unices suffer the same problem),
but one of my larger annoyances are the wildly different and wonderfully
inventive keystroke combinations used to do similar things.

For example, I use screen and vi quite often. screen uses "ctrl-A [TAB]"
to switch between window regions. vi uses "ctrl-w h|j|k|l" to do the same.
Links uses tab. Other apps use alt-tab, or ctrl-p (previous).

Inside X, default bindings to switch workspaces vary from window manager
to window manager. Some use Alt-F#, others CTL-#, etc..

Now I understand *why* the keystrokes are different -- each application
has different heritage -- but the main annoyance is that there's no simple
method to change them all. Some require xmodmap settings, others need to
use the wm config, others are set by exporting a shell var, etc..