PDF Editing

Looking for open source software where i can edit/ fill out pdf documents. Any recommendations?

LibreOffice Draw and Inkscape can edit PDFs IIRC.

“edit” as in filling out form fields, or actually changing the PDF’s contents?

I use evince for filling out forms and inskape for actual editing. Being a image editor inkscape can only open one page at a time. You can use ghostscript to concatenate the individual pages after you’re done.