open source and/or free software to edit shw files

I'm looking for a alternative open source (or free) Corel WordPerfect software. I'm with some .shw presentations files that I must edit them. I looked at google without any success.

Thanks for the attention.

From superuser PLS

• shw files are specific to Corel and you'll have to use "Corel WordPerfect" or "CorelDRAW Graphics Suite" to edit them. There is no other alternative.

  Mehper C. Palavuzlar : Why downvote? I think someone is annoyed because there is no alternative. Too bad.

  PLS : Thanks, but still open for other opinions
  From Mehper C. Palavuzlar