I would like to request that a developer looks at making an PortableApps version of PDF Split and Merge. It is a Java based program to split the page of a PDF document or merge several PDF documents together. The program can be downloaded as a Zip file and can be extracted to any portable location and run. It does not seem to need an dependencies (except for JRE obviously)or leave any files behind on the host PC.
Website: http://www.pdfsam.org
Licence: GPL