A few months ago, I pushed to github a small python script which builds fish commands for each graphical user interface program. So you can type textwrangler_app in your terminal and this will launch the TextWrangler app and tell it to open filename.

Today I pushed a set of fixes to that tool, in particular it should handle properly application names which contain single quotes, it should also use a bit less memory as the list of application paths is not fully loaded into memory.