HEATKEYS

PDFSplit! is a free online PDF splitter. No installation, no registration, it

No file size limits, no ad watermarks - just a free, beautiful and simple online pdf compressor to reduce the size of your PDFs and maintain good quality.

PDFMate Free PDF Converter is a 5-in-1 PDF program to easily convert your PDF to editable Text files, common images, EPUB eBooks, HTML files, and even SWF files.

Sciweavers is a bookmarking network for researchers to share and explore research paper preprints grouped by conference name and year or subject area.

The Adobe Acrobat User Community is a global resource for users of Acrobat and PDF, with free eseminars, tips, tutorials, videos and discussion forums.

A-PDF Solution is a PDF software developer who focuses on providing affordable Acrobat PDF tools and customization service for personal and small business.

Yahoo! Answers is a new way to find and share information. You can ask questions on any topic, get answers from real people, and share your insights and experience.

wikiHow is a wiki based collaboration to build the world’s largest, highest quality how to manual. Our multilingual how to manual has free step-by-step instructions on how to do all types of things.

Bluebeam

Scientific physics forums for professionals and students to discuss serious issues and topics regarding physics in theory, practice, study and reality. Students can also find help for homework and career perspectives