Great, thanks a lot for your efforts. I've added the syntax definition with some minor edits to Textastic. I had to move the autocompleteWords to keywords because Textastic doesn't highlight the autocompleteWords. It will be included in the next update.

The only problem is that the escape rules of PowerShell are not honored. But that's something I can't fix easily right now.

Here's a screenshot of the syntax definition in action:

Here is the image for reference.

Looking forward to the screenshot(s).

I've uploaded the variant in Smultron to http://www.textasticapp.com/support/powershell_smultron.plist

Cool, thanks!

I also noticed that the latest Mac App Store version of Smultron now has a PowerShell syntax definition. This one is quite different from yours. Can you try it out and tell me which one is "better"?

Textastic uses libcurl for FTP and SFTP file transfers.  Unfortunately, the error messages of libcurl are not localized. But, while it would be nice if they were also available in German, I don't think it's really that important.

Sounds good. I've seen similar implementations in IDEs from Borland/Inprise/Embercadero.