Now (13/June/2016), both versions are stable:
Most Recent! : Merge Software Series 6, version 6.7.2; includes features "PDF compression" and "bookmark xml" and features to create a "Digital Signature" and "Bookmarks (Outlines)" and "Table of Contents" for PDF documents, (immediate download) here or (official download page) here ( For other features Dolce Edition 2015 is more recent).
Split : PDF Split Software Dysprosium (Dolce edition 2015), with improved bookmark splitting here.
Stamp : Stamp and Watermark Software Dysprosium (Dolce edition 2015), PDF documents, here.
Inject : PDF Injection Software Dysprosium (Dolce edition 2015), with added feature for removing blank pages, and deleting pages of documents as a separate PDF document (cut & paste), here.
Watermark : PDF Watermark Software Dysprosium (Dolce edition 2015), with added feature for multiline watermark, and different watermarks on different pages; convert PDF to image and images to PDF. here.
Encrypt (GUI): Encryption Tablet Version 3; create public, private keys, PEM, DER, PFX, JAR signing, here.
PFX (Commandline): As a by-product, now, this simple tweak is available for creating PFX (PKCS#12) encryption files, here.
Perhaps you are here for PDF software: They are organized with help and issues page, here.
Please keep this work maintained by promoting this website. Open software are always under pressure of competing commercial ones, though these are mostly origininated from those. If you find anything of assistance here, please promote by creating a link in your site. Copy and paste the URL: http://www.codesforus.blogspot.com/
Overall, you scored as follows:
1% scored higher (more nerdy),
0% scored the same, and
99% scored lower (less nerdy).
What does this mean?
Your nerdiness is:
All hail the monstrous nerd.
You are by far the
SUPREME NERD GOD!!!