powershell.el is a combination of powershell.el by Dino Chiesa and powershell-mode.el by Frédéric Perrin and Richard Bielawski. Joe Schafer combined the work into a single file. ; Frédéric Perrin Comments: The original powershell-mode.el was written from scratch, without using Vivek Sharma's code: it had issues I wanted to correct, but unfortunately there were no licence indication, and Vivek didn't answered my mails. ; Rick Bielawski Comments 2012/09/28: On March 31, 2012 Frédéric gave me permission to take over support for powershell-mode.el. I've added support for multi-line comments and here-strings as well as enhancement/features such as: Functions to quote, unquote and escape a selection, and one to wrap a selection in $(). Meanwhile I hope I didn't break anything. Joe Schafer Comments 2013-06-06: I combined powershell.el and powershell-mode.el. Since powershell.el was licensed with the new BSD license I combined the two files using the more restrictive license, the GPL. I also cleaned up the documentation and reorganized some of the code.