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DiffPDF 2.1.2

Quickly highlight the differences between two PDFs

by Mike Williams

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License: Freeware
Operating Systems: Mac OS X, Windows 7 (32 bit), Windows 7 (64 bit), Windows Server, Windows Vista (32 bit), Windows Vista (64 bit), Windows XP
Requirements:
Languages: English
Software Cost: Free
Date Updated: 25 February 2013
Watchlist: Add download to my watchlist
Downloads To Date: 962
Developer: Qtrac Ltd.
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DiffPDF 2.1.2
Quickly highlight the differences between two PDFs

DiffPDF is a portable open source tool which compares two PDFs and then highlights the differences between them.

By default the program will compare the words in your documents. If that's not appropriate, though, you can run the comparison by characters, or even just appearance (the latter will detect if a diagram has changed, say, or a paragraph has been reformatted).

Normally PDF is extremely easy to use. Click "File #1" and specify your first file; click "File #2" for the second", then click "Compare" and within a moment or two your documents will be highlighted to show any differences between them.

If you only want to know whether the documents are different or not, then clicking the Log tab will reveal all. You can also scroll through a PDF to visually check that everything is as you expected. And there's also the option to save a PDF with only the pages which vary, again with the differences highlighted (which could be particularly useful if you're running the comparison for someone else).

This may be enough, but if you run into problems then the program has a few more settings and features which might help. You can choose to exclude the margins, for instance; it's possible to compare particular page ranges only within a PDF; and Zoning is an interesting technique to try and avoid false positives. (These are rare anyway, but check the Help file for more information.)

What's more, you can even run DiffPDF from the command line, very handy if you're comparing a lot of files and need to automate the process.

Verdict:

An excellent tool for comparing PDFs

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Spotlight: Free Full Software

Spektrel Art 1.0.0

Free Full Commercial Software

Spektrel Art is a stand-alone program and Photoshop plugin which transforms digital photos into "magical art that glimmers and gleams with intersecting lines of tapered light".

What does that mean? Essentially it applies a configurable mix of effects, enhancing edges, smoothing backgrounds and emphasizing colours. Take a look at the thumbnail for one example, and the official product page has more.

Spektral Art works much like any similar tool. Open an image, click one of the thumbnails to apply a particular preset, or click a few buttons and drag some sliders to fine-tune the results.

There's surprising scope for variation, too. For example, just switching from the "Light" to "Dark" theme can transform a bright and friendly image into something dark and sinister, at least in some cases (results vary depending on the source image).

Please note, the demo version doesn't allow images to be saved.

SPECIAL OFFER: as we write, the developer is offering Spektral Art for free. The offer expires August 29th. Please note that you must provide your name, address and phone number to receive your free license.

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