Free pdf editor software for linux

PDFKreator is an easy to use KDE tool for creating PDF documents out of a bunch of image files. It heavily uses ImageMagicks convert tool, tiff2ps and ps2pdf.

PDF Toolkit is a simple servicemenu for PDF files.
Main features:
- give master password
- give user password
- allow only printing
- watermark
- extract a range of pages
- join PDF files

Panda is a PDF generation API written in C.
The Panda PDF Generator is intended to make PDFs on the fly for the Web, but may be used to generate any PDF document you want.
Enhancements:
- As you may already be aware, the most important change in 0.5.4 is that the library is now available under the terms of either the GPL or LGPL (your choice). In order to accomplish this, the TDB code was removed, and either Enlightenment DB or Berkeley DB (version 4) must be linked to in its place.
- Other changes include the addition of link annotations (internal and external), pkg-config support, and an RPM. The main point of this release, however, was the licensing issue.

PDFUtil is a service menu entry that allows rotate and other interesting utilities for pdf files.

PDF Download is an extension which allows you to choose what to do with a PDF file on a website.

Allows to choose if you want to view a PDF file inside the browser (as PDF or HTML), if you want to view it outside Firefox with your default or custom PDF reader, or if you want to download it!

PDF::Reuse::Tutorial is a Perl module that will teach you how to produce PDF-files with PDF::Reuse.

In this tutorial I will show some aspects of PDF::Reuse, so you should be able to use it in your own programs. Most important is how to produce and reuse PDF-code, and then if you are interested, you can look at Graphics and JavaScript, so you can to do special things.

Reusing code:

You can take advantage of what has been done before, it is not necessary to start from scratch every time you create a PDF-file. You use old PDF-files as a source for forms, images, fonts and texts. The components are taken as they are, or rearranged, and you add your own texts and you produce new output.
If you dont care too much about the size of your templates, you should make them with a commercial, visual tool, thats most practical; and then you should use PDF::Reuse to mass produce your files. In this tutorial I show in many places how create single files with PDF::Reuse. That is possible, but more of an exception. I do it here to show the technique. You will anyway need it to add texts and graphics to your templates.

Graphics:

With this module you get a good possibility to program directly with the basic graphic operators of PDF. This is perhaps an advanced level, and you can avoid it if you want. On the other hand, it is not very difficult, and if you take advantage of it, your possibilities to manage text and graphics increase very much. You should look at the "PDF-reference manual" which probably is possible to download from http://partners.adobe.com/asn/developer/acrosdk/docs.html. Look especially at chapter 4 and 5, Graphics and Text, and the Operator summary.
Whenever the function prAdd() is used in this tutorial, you can probably get more explanations in the "PDF-reference manual". The code, you add to the content stream with prAdd(), has to follow the PDF syntax completely.

JavaScript:

You can add JavaScript to your PDF-file programmatically. This works with Acrobat Reader 5.0.5 or Acrobat 5.0 and higher versions.

You should have the "Acrobat JavaScript Object Specification" by hand. If you havent got Acrobat, you can probably download it from http://partners.adobe.com/asn/developer/technotes/acrobatpdf.html. It is technical note # 5186. JavaScript for HTML and PDF differs so much that you need the manual, even if you know JavaScript very well.

jpg2pdf PRO is the PRO version of jpg2pdf. jpg2pdf PRO offers you all the features of jpg2pdf 2.x plus these important features: convert every single jpeg to a single pdf (with -album to create a unique PDF) jpg2pdf PRO can automatic detect is the jpeg image is rgb or gray or cmyk and create the correct pdf. jpg2pdf PRO can automatic check if the jpeg image is rgb or gray or cmyk and create the correct pdf or pdf album.
NOTE: jpg2pdf PRO tries to detect if the cmyk image is made by Adobe Photoshop and will use inverted colours to create the pdf (it appears that Adobe Photoshop writes inverted data in CMYK JPEG files: 0 represents 100% ink coverage, rather than 0% ink as youd expect)
Main features:
- convert every single jpeg to a single pdf, to put every jpeg in a pdf album, like normal jpg2pdf, you can use the option -album
- jpg2pdf PRO can automatic detect is the jpeg image is rgb or gray or cmyk and create the correct pdf. Note: jpg2pdf PRO tries to detect if the cmyk image is made by Adobe Photoshop and will use inverted colours to create the pdf (it appears that Adobe Photoshop writes inverted data in CMYK JPEG files: 0 represents 100% ink coverage, rather than 0% ink as youd expect)
- center parameter will center evary jpeg image in the final pdf page
- Using image parameter (to set the paper format of the pdf page equal to the image) is possible to use border parameter to set a border around the image
- Its possible to set a directory where to put the pdfs (pdfdir) and the jpegs (jpgdir)
- Its possible to re-run infinitely jpg2pdf setting the wait seconds

PDF::ReportWriter is a Perl module that produces high-quality PDF reports from a report definition and a data array.

PDF::ReportWriter supports text formatting and alignment, unlimited grouping with group functions, intelligent page breaking, image support, color support, shaped cell backgrounds, and numeric formatting.