Apvlv is a cross platform open source software.

Like Vim, Apvlv makes people reading their PDF files just like using Vim.

So, Apvlv bindings lots of Vim command and its behaviour is like Vim. For example, < Ctrl-f > to forward page, < Ctrl-b > to previous page, ‘k’,'j’,'h’,'l’ to scrolling a page up, down, left or right, and so on.

And, Apvlv can understand that how many times you want to run the command.

The only thing you need to do is typing the number before the command. For example, typing ‘50′ and < Ctrl-f > will go forward 50 pages, typing ‘30′ and < Ctrl-b > will go previous 30 pages.

What’s more import is apvlv can support view a directory as content of a pdf document. Pressing ‘k’ or ‘j’ to move selected up or down, ‘h’ or ‘l’ to collapse or expand a dir, and press ‘t’ will open the selected document in a new tab.

for the last source code and pre-compiled binary, please visit http://code.google.com/p/apvlv/

Introduce
wkhtmltopdf is a simple shell utility to convert html to pdf using the webkit rendering engine, and qt.
Usage
To use this software download the latest static release unpack it and run it like
wkhtmltopdf www.rubypdf.com rubypdf.pdf
for a list of available options see
wkhtmltopdf --help
Features

• Convert web pages into PDF documents using webkit
• Adding headers and footers (static version only)
• TOC generation (static version only)
• Batch mode conversions
• (Linux) No longer requires an XServer to be running (however the X11 client libs must be installed)
• Supports multiply platforms, Windows, Linux, Mac OS X and so on

Download
precompiled binaries and source code

btw, there is another project named Webkit2pdf, is built with Webkit, GTK+, Poppler-glib, not qtwebkit.
Webkit2pdf is a little tool designed to fetch web pages and export them to numbered PDF files (or to print them). It allows specifying paper size and output directory. It is released under the terms of the GPL, version 3 or later.