pdfMachine Signer
pdfMachine Signer is the easy way to digitally sign your PDF files. Simply, quickly and lowpriced , Sending 1 to 1 signed copies of a document. It's never been so easy to send documents. Print your document simply through our pdfMachine (printer driver) and your email program will open... A watermark will be generated on each PDF page when a PDF is signed. ... - Easily sign PDF documents from the pdfMachine menu. ... - Have your selected signature automatically applied to PDF's you produce. ... - Or leave the signature invisible.
http://www.broadgun.de/pad/pdfmachinede.exe - 5Mb - Download - Screenshot

Aloaha PDF Signator
The Aloaha PDF Signator can sign any existing PDF Document. Aloaha does not require special prepared PDF documents or signature fields. The digital signature of the PDF file will automatically be checked and indicated by the PDF viewer (Acrobat Reader). ... PDF Signator allows you sign PDF documents without any need to purchase full Adobe Acrobat® or Adobe Document Server for Reader extensions®. ... Using PDF Signator you can now open, view and navigate PDF documents directly within PDF Signator.
http://www.aloaha.com/download/aloaha_signator.zip - 6Mb - Download - Screenshot

PDFBlackbox (VCL)
PDFBlackbox (VCL Edition) is a comprehensive collection of native components that help you compress, encrypt, sign and compress PDF documents from your Delphi or Kylix applications. Both symmetric and certificate-based (X. 509) encryption and signing is supported. ... PDFBlackbox supports full range of PDF security operations, including * PDF standard password-based data encryption using MD5 + RC4/40 or RC4/128 algorithms; * PDF certificate-based public key data encryption using RSA algorithm and PKCS#7 format; * certificate-based data signing using SHA1 with RSA algorithms and PKCS#1 or...
http://www.eldos.com/files/sbb/secbboxeval.zip - 16Mb - Download

PDFBlackbox (.NET)
PDFBlackbox. NET is a comprehensive collection of managed components that help you encrypt, sign and compress PDF documents from your . NET Framework applications. Both symmetric and certificate-based (X. 509) encryption and signing is supported. PDFBlackbox supports full range of PDF security... 6 PDFBlackbox components are a clean-room implementation of PDF format specification, which don't use any third-party libraries for core functionality. ... 0, Mono (1. ... 1 or 2. ... NET Framework 1. ... It requires .
http://www.eldos.com/files/sbb/secbboxnet.zip - 9Mb - Download

Aloaha PDF Suite
Your PDF Files are just one click away! Aloaha PDF Suite is the perfect tool to create your PDF Documents. One click is enough! Just print your document to any of your printers and Aloaha will convert the print job to a PDF Document, which you can save, digitally sign, email, fax or publish to... - Creates and edits vector based PDF Files - Digitally sign with our personal digital Certificate - PDF-Signature Interchange Standard compatible - supports PC/SC compatible smartcard reader - e-ID support - some cards are supported native (no CSP needed) - 40 and 128 Bit Encryption - compression...
http://www.aloaha.com/download/aloaha_pdf.zip - 9Mb - Download - Screenshot

GetPDF Encryptor Decryptor
Encrypt PDF files with passwords and gives you a high degree of control, letting you allow or disallow such actions as changing, printing, copying, extracting, signing, filling, assembling or merging a PDF file. With this utility, you may decrypt PDF files as well. ... GetPDF Encryptor Decryptor is standalone, which does not require Adobe Acrobat.
http://www.getpdf.com/pdfed.exe - 841Kb - Download - Screenshot

PDF4U Pro
Create PDF files from any Windows application running on Windows NT (SP3+), Windows 2000, Windows XP and Windows Server 2003. The software installs itself as a print driver, all you have to do is to click "Print" from your application to create PDF files. ... Users may batch convert DOC to PDF, RTF to PDF, TXT to PDF, XLS to PDF, HTM to PDF, DWG to PDF, DXF to PDF with a mouse-click. ... Another difference is support for password protection with 40- or 128-bit encryption to secure PDF documents as well as access control preventing your PDF document from being modified, copied, converted,...
http://www.pdfpdf.com/pdf4u_pro.exe - 2Mb - Download - Screenshot

PDF Encrypter
PDF Encrypter can be used to protect your PDF files with 128-bit strength user and owner passwords, set all permissions(such as coping, editing, printing, selecting text and graphics, fill in etc), and prevent PDF files from being printed, changed, copied, extracted, signed, filled, assembled... It is the fast, affordable way to encrypt a lot of pdf files to encrypted pdf files once time for saving your time! ... It supports all popular PDF formats. ... And PDF Encrypter V2. ... Its easy-to-use interface allows you to encrypt PDF files by simply few clicks.
http://www.8848soft.com/d1/pdfenc_setup.exe - 979Kb - Download - Screenshot

Print2PDF Server Edition
Adobe PDF converter (DOC to PDF), creator, writer solution for any organization with a network server. Distribute this shareable print driver with your workgroup and empower LAN users with PDF conversion. Print2PDF uses print output for conversion into an Adobe Acrobat Reader compatible PDF file. ... Sign documents electronically using a certificate or Digital ID (PKCS#12). ... Merge output from different applications into a single PDF. ... Secure and encrypt PDF documents with 40-bit or 128-bit RC4 encryption and add password protection.
http://download2.software602.com/p2pdf5se.exe - 10Mb - Download - Screenshot

Print2PDF
Adobe PDF converter (DOC to PDF), creator, writer for Windows. Print2PDF uses print output for conversion into an Adobe Acrobat compatible PDF file. Choose from multiple page sizes, orientations, watermark / stamp insertion, metadata access and file resolutions (up to 4000 DPI). ... Sign documents electronically using a certificate or Digital ID (PKCS#12). ... Control the metadata information that is saved to a PDF document. ... Save time and increase your productivity with the Convert2PDF batch conversion application to quickly convert multiple office documents to the Adobe Reader...
http://download2.software602.com/p2pdf5.exe - 9Mb - Download - Screenshot