Here is a Windows command line version PdfSigner with TimeStamp(TSA) support,

Usage pdfsigner InPdf OutPdf Pkcs12KeyStore Pkcs12KeyStorePassword

because It is a demo application, so the TSA server only supports http://tss.pki.gva.es:8318/tsa
If you have interest, please download it here,pdfsigner(4.9M)

I got a email with the following requirement,

I came across your post while searching for a solution to add barcode to my invoices.
I can print the invoices as a pdf file but the problem is to have my tracking number printed as a barcode.
Can you do some software customization so it can read a certain area of the pdf file, convert and insert a barcode for printing ? I usually print about 50 invoices at a time.

After many exchanges, I finally decided to use pdftohml to parser pdf and get the text with the give position, use itext to insert barcode In order to be convenient for the customer, I use gcj to compile it to native code, so it can be run without jvm.

And my customer has used this application over 3 years.

OpenSlide(aka OSlide) is an open source WWW-based slide share system. You can make your own SlideShare or SlideBoom at your local server. It it not always the case that users upload their presentation/document because of the document’s copyright or miscellaneous reason. OpenSlide is used for these case and gives users easy to setup their own slide hosting website.
OpenSlide works on most UNIX and its compatible OSs. To install OpenSlide from a source package, perl, openoffice, swftools, unoconv are required.
It has the following features,

• Embed slideshows into your own blog or web site
• Share slideshows publicly or privately. There are several ways to share privately
• Sync audio to your slides
• Download the original file
• Supported multiply file formats: PowerPoint(.ppt/.pps), Word(.doc), PDF(.pdf), OpenOffice.org Impress(.odp), Writer(.odt) and so on.

OSlide Demo Site,
http://kadai.info/oslide/
OSlide Project webite,
http://oslide.sourceforge.net/