A quick script to add signature images to PDFs, because I couldn't find anything that worked well for the purpose under Linux.
Pros: should work with most PDFs, and with signatures as PNG's or JPG's. It preserves the incoming PDF's text format (e.g. doesn't convert every page to images like some alternatives).
Cons: no gui yet.
Install with pip:
pip install signpdf
Or from git:
git clone https://github.com/yourcelf/signpdf
cd signpdf
virtualenv venv
source venv/bin/activate
pip install -r requirements.txt
Sign the first page of "contract.pdf" with the signature "sig.png":
signpdf contract.pdf sig.png --coords 1x100x100x150x40
Coordinates format is: <pagenum>x<x-coord>x<y-coord>x<width>x<height>.
<pagenum>the page number, count starts at 1.<x-coord>horizontal distance from bottom-left corner in PDF units (1/72 inch).<y-coord>vertical distance from bottom-left corner in PDF units (1/72 inch).<width>width of signature in PDF units (1/72 inch).<height>height of signature in PDF units (1/72 inch)
Other options:
--dateAppend a date to the right of the signature.--outputDestination filename. Default is to append_signedto the incoming PDF name.
For more usage details, run signpdf --help.