The TextFilter plugin lets You create the kind of tools You want.

Regarding the keyboard shortcuts: You can assign a shortcut to every "action" that's provided by jEdit itself and plugins and to every macro via Global Options -> Shortcuts.

The TextFilter plugin creates such an action for every filter You've defined. However, when You chose "Plugin: TextFilter" in the upper dropdown of the Global Options -> Shortcuts dialog, You won't see these actions (maybe because they are created at runtime). Nevertheless You can assign a shortcut to Your own TextFilter action by editing the "properties" file in jedit's settings directory. Imagine Your filter's name is "MyFilter", then ading the following line into the "properties" file assigns CTRL+SHIFT+T to this filter:
textfilter.actions.MyFilter.shortcut=CS+t

Note: After You've edited the properties file, You have to restart jEdit.

Robert