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Name	Website	Introduction
w3schools.com	w3schools.com	CSS tutorial with examples, quizzes, references, and an editor.
css-tricks.com	css-tricks.com	Dedicated to the world of CSS and related technologies. Snippets, videos, tricks, and tutorials.
online-convert.com	online-convert.com	Online converter for audio, video, ebook, image, and document files.
smallpdf.com	smallpdf.com	Compresses merge, splits, and unlocks PDF files. Also various conversions. Supports Dropbox and Google Drive.
zamzar.com	zamzar.com	Online file conversion, covering a wide range of different image, document, music, video, and compression formats. Free for files up to 100MB, and premium services are also available.
w3.org	w3.org	World Wide Web Consortium validator, maintained at W3C by W3C staff and collaborators. Checks the markup validity of Web documents in HTML, XHTML, SMIL, and MathML.
ilovepdf.com	ilovepdf.com	Merge PDF files or split PDF files online for free! Quick and easy.
freepdfconvert.com	freepdfconvert.com	Online web-based document to PDF converter software. Converts and creates PDFs from various types of files like DOC, XLS, and PPT.
pdfonline.com	pdfonline.com	Converts documents into PDF format, and PDF documents into a number of other formats for free.
pdfescape.com	pdfescape.com	A new way to open and edit PDF files online, PDFescape frees users from the typical software requirements for using the de facto document file format. Completely online, PDFescape requires no more than a modern internet browser and an active internet connection. PDFescape is a free PDF reader, free PDF editor, free PDF form filler, and free PDF form designer.
pdf2doc.com	pdf2doc.com	Free online converter for PDF document to Microsoft Word DOC format
convertio.co	convertio.co	Free online conversion tool. More than 60 conversion types are supported.
htmlgoodies.com	htmlgoodies.com	Provides articles on the topic of web page design.
pdftoword.com	pdftoword.com	Both online and offline tool allows the creation of editable DOC/RTF files and the re-use of PDF content in other office applications.
foxitsoftware.com	Https://www.foxitsoftware.com/	Foxit Software has positioned itself to be a PDF technology solution provider and it has become an alternative to Adobe for many PDF users. Foxit is dedicated to providing high-quality products for PDF file printing, PDF displaying, PDF graphic designing, and PDF text processing.

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Name	Website	Introduction
random.org	random.org	RANDOM.ORG offers true random numbers to anyone on the Internet. People use RANDOM.ORG for holding drawings, lotteries, and sweepstakes, to drive games and gambling sites, for scientific applications, and for art and music. RANDOM.ORG’s randomness comes from atmospheric noise, which for many purposes is better than the pseudo-random number algorithms typically used in computer programs.
stanford.edu	Infolab.stanford.edu/~ullman/	An author of computer science books, on algorithms and Discrete Mathematics.
stonybrook.edu	Www3.cs.stonybrook.edu/~algorith/	This is a collection of implementations for 75 fundamental algorithms problems, including data structures, numerical and combinatorial algorithms, graph algorithms, and computational geometry. Implementations are available in C++, Java, Fortran, and other languages.
usc.edu	usc.edu	Signal and Image Processing Institute.
combinatorics.org	combinatorics.org	A refereed all-electronic journal that welcomes papers in all branches of discrete mathematics. Full text is available free online.
nist.gov	Csrc.nist.gov/groups/ST/toolkit/rng	Project to develop a battery of statistical tests to detect nonrandomness in binary sequences, to produce documentation and software implementation of these tests, and to provide guidance in the use of these tests.
elte.hu	elte.hu	Department of Computer Algebra. Members, research projects, and computer algebra resources. Site in Hungarian and English.
hackersdelight.org	hackersdelight.org	Offers a collection of programming tricks at the bit level, including a superoptimizer program for RISC computers.
usc.edu	Sipi.usc.edu/database/	A collection of digitized images in TIFF format. Catalog in PDF. Previews and images are free online, database on magnetic tape can be purchased.
kent.edu	Personal.kent.edu/~rmuhamma/Algorithms/algorithm.html	Lecture notes; applets and code in C, C++, and Java; links regarding books, journals, computability, quantum computing, societies, and organizations.
brandeis.edu	Cs.brandeis.edu/~storer/	The Data Compression Conference.
cmu.edu	Cs.cmu.edu/~chuck/lennapg/	Information about Lena Soderberg (née Sjööblom) and the history of the famous test image.
nyu.edu	Cns.nyu.edu/~eero/	Computer vision, image processing, motion, and compression.
st-and.ac.uk	Www-gap.dcs.st-and.ac.uk	The group at the University of St. Andrews developed GAP, a free system for computational discrete algebra.
vcodex.com	vcodex.com	Video and image coding tutorials, links, resources, and research.

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