xtopdf is a PDF creation/conversion toolkit. It is both a set of end-user tools and a library for developers.
It supports creating PDF (Portable Document Format) files from plain text, DBF (XBASE), CSV (Comma Separated Values), TDV (Tab Delimited Values) and XLS (Microsoft Excel).
Yet Another Free PDF-composer: can compose PDF documents from picture files and other PDF files, encrypt the created document and send it to some e-mail address. YAFPC is aimed to act as command-line tool in combination with GhostScript