Open Source Adobe Acrobat Pro?

[asterroc]

I'm looking for a free and/or open source program that will let me edit .pdf files and save them partially filled in and continue them later. Any suggestions?

Edit: I use a Mac.

Comments

[zandperl.livejournal.com]

Oh foo, I forgot to mention in the origional post that I use a Mac.

[sirroxton.livejournal.com]

Oh, sorry.

One thing you can do is save as postscript (which will retain form data), and then use Preview to convert to PDF, but that's a pain.