free data models

I am trying to model a complex questionnaire and during my googling for best practices i discovered this website: http://www.databaseanswers.org/data_models/
An excellent site full of free and well prepared data models on several topics..

free manual search engine

Discovering beneficial manuals, especially when newbie to a topic, technology etc.,  is vital.
 http://the-manuals.com/ seems to retrieve good documentation..

pdf to word converter

When there is a time limit for composing a tutorial for something, a good pdf to word converter tool is a life saver. 14-day trial downloaded from http://www.pdftoword.com/ worked for me..
http://www.pdfonline.com/pdf-to-word-converter/ took a while to convert the pdf online and only converted the document partially because of its size..

two useful online tools

an online free tool for merging multiple pdf files into one: http://foxyutils.com/mergepdf/

an online image conversion tool: http://www.go2convert.com/