Three steps to viewing hidden files like .htaccess in TextWrangler without using Terminal (OS X)

Here are the three steps:

1. drag folder containing file from Finder to TextWrangler (in the Dock)
2. click on the magnifying glass beneath the list of files
3. select "Everything" beneath the "Show" heading

When using the Open dialog box (File->Open...) you can reveal hidden files by pressing Shft+Cmd+. and hide them again doing the same.

See also blogpost: http://sketchytech.blogspot.co.uk/2013/01/three-steps-to-viewing-hidden-files.html