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7-Zip is a file archiver with the highest compression ratio. The program supports 7z, ZIP, RAR, CAB, ARJ, CPIO, RPM, DEB, GZIP, BZIP2 and TAR formats. Compression ratio in the new 7z format is 30-50% better than ratio in ZIP format. Also 7-Zip compresses to ZIP 2-10% better than PKZip and WinZip. 7-Zip has additional powerful command line version and FAR Manager support.
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SuperZip - the quick and easy way to zip and unzip files. Step-by-step tutorial guides users through the process quickly and painlessly. In addition to the standard archiving functions, SuperZip offers a host of powerful features and options. These include drag-and-drop from Explorer, an archive browser and viewer, automatic program group and icon creation for extracted files, multiple floppy disk spanning for larger archive files, long filename support, and much more. SuperZip offers the functionality necessary for the power user but is simple enough for any novice to quickly master. Ample help and tutorial information are included.
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The addZIP Compression Components are the simplest way to add the industry-standard PKZIP compatible file compression and decompression to your programs. These royalty-free, multithreaded ActiveX/COM components are compatible with all 32-bit development software including Visual Basic 6/.NET, C/C++, Delphi and Visual FoxPro. The addZIP and addUNZIP components have no user-interface so they can be used both in desktop and server applications. Although .ZIP archives can be created (and extracted) in as little as two lines of code, there are plenty of properties to set in order to select the required files, set the compression level and speed etc etc
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ZIP files are simply collections of one or more files, that have been digitally compressed to reduce their file size. By compressing the size of those files, and then bundling them together into one single file, called a ZIP file, you make it easier to upload and download your files. A compressed file will download and upload much faster, thereby saving you time. There have been many formats for compressing files over the years, but the most common format is ZIP.
The ZIP Wizard is the program of choice to create these ZIP files. The ZIP Wizard is by far the "easiest to use" ZIP utility available. The Wizard knows his stuff, and he will be happy to step you through the ZIPping process. The friendly (and cute) ZIP Wizard interface will make you feel confident that your files are being ZIPped up correctly. It's as simple as: 1) Choose the files you want to ZIP up... 2) Give your ZIP file a new file name... That's it! Presto! Like magic your files are ZIPped! You can even send your ZIP as an email attachment right from within The ZIP Wizard interface!
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The Unzip Wizard - A utility that makes unzipping ZIP archive files simple. Step by step instructions greatly helps novices who are unfamiliar with unzipping. The Wizard knows his stuff, and he will be happy to step you through the unzipping process. The friendly Unzip Wizard interface will make you feel confident and secure that your ZIP files are being unarchived properly. It's as easy as 1-2-3! Simply... 1) Choose the ZIP file you wish to unzip, 2) Select the files you wish to extract, 3) Choose a destination... That's it! Presto! Your files are unzipped!
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A powerful backup utility with a lot of options and quite user-friendly. Backup2004 Pro supports unlimited zip file size (Pkware Deflate64). With Backup2004 Pro you can backup any folder to any destination (network lan, any removable media including CD and DVD) .Backup2004 Pro comes with its own burner driver. It can span archive files over multiple media.You can schedule any job, upload archives to an FTP or HTTP server. It offers a graphical backup map, catalog, log files and can email you when a job is done.
Backup2004 Pro is able to manage backup in classic mode (1 file per job) or in unique archive mode (1 file updated by each job).
Backup2004 Pro offers multiple ways to restore one or more specific files, a group of files (e.g.*.doc), a folder or the entire archive file just with few clicks. Restore can be processed to the orignal location or to any destination. Backup2004 Pro is built in verify and repair function. It includes functions to cut archive file in smaller pieces or to merge multple parts archive file. A general report displays the status of each job.
Backup2004 Pro provides 3 compression methods : Pkzip deflate64, standard Pkzip 2.04 and Bzip. All are compatible with Winzip 8.1. Backup2004 Pro lets you define a standard profile to easily reuse it when you define a new backup set. It is also delivered with predefined backup sets (My emails, My documents, Outlook, Outlook Express, Windows Shell and Registry).
From the catalog you can search for files without opening each individual archive file.
Backup2004 Pro interface uses the Office 11 look and feel. Backup2004 Pro is in English and French..
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1st Choice Zip looks and feels just like Windows Explorer, except you can also transfer files to and from Zip Archives. It's features include:
Drag-and-Drop: You won't have to learn any new commands. Simply drag files from your local computer to any Zip Archive.
Copy Entire Folders: Unlike other Zip Extraction programs, you won't have to perform Directory transfers in multiple steps. ALL of the files and folders contained in any Directory can be Zipped or Unzipped in just ONE process.
Background Processing: 1st Choice Zip can be minimized while file transfers are taking place, so you can perform other tasks on your computer while you are waiting.
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1st Choice Zip looks and feels just like Windows Explorer, except you can also transfer files to and from Zip Archives. It's features include:
Drag-and-Drop: You won't have to learn any new commands. Simply drag files from your local computer to any Zip Archive.
Copy Entire Folders: Unlike other Zip Extraction programs, you won't have to perform Directory transfers in multiple steps. ALL of the files and folders contained in any Directory can be Zipped or Unzipped in just ONE process.
Background Processing: 1st Choice Zip can be minimized while file transfers are taking place, so you can perform other tasks on your computer while you are waiting.
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CRC32 Static Library for Microsoft VC++ was produced to make your CRC checking operations quick & easy to implement seamlessly without the need for an external DLL
The CRC is a "digital fingerprint" of a file, With CRC32 you can "melt down" a huge 20 MB (or even much bigger) file to have a small, handy reference to it, a single 32-bit number like 7d9c42fb (hexadecimal notation) which would unambiguously reflect the entire contents of this huge file. Now if some changes to this file happened, no matter how small, maybe only a single wrong bit somewhere in the middle, a new CRC-32 calculation would yield a completely different reference number (say 3faa83bd). So there?d be no doubt about it - this is not the same file anymore. On the other hand if the reference number was still the same (7d9c42fb) you might be sure that the file hasn?t changed.
The algorithm of CRC32 is exactly the same as that internally used by PKZIP and WinZip; i.e. the CRCs calculated by PKZIP and CRC32 are identical. That?s another fine thing about CRC32 - it calculates compatible, widely used 32-bit checksums, not just any numbers. You can use the 'pkunzip.exe -vt filename.zip' command to see that PKZIP?s CRC-32 values of files stored inside the filename.zip are identical to that calculated by CRC32 for these files.
Though you can use CRC32 to calculate 32-bit checksums of any file the real strength and usefulness of CRC32 is in comparing Wave Sound Files to see if their non-silent music parts are identical. In particular CRC32 may come in handy when comparing two different extractions of a CD Digital Audio track to ensure that the performed digital copy is perfect.
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This high-performance Zip & Unzip data compression library lets your applications create and manipulate 100% PKZip compatible Zip files as well as compress/uncompress data directly in memory. Offers the ultimate flexibility and is the easiest to use product of its kind. Includes a state-of-the-art, fully documented ActiveX COM component that provides the industry's most complete feature set and the fastest multi-threaded compression engine.
This ActiveX component supports single-threaded (STA) and multi-threaded (MTA) apartment models and has very low memory requirements. Perfectly suited for use in environments running multiple zip/unzip operations simultaneously, can run in the background and can be dynamically instantiated for formless use.
Xceed Zip, already known for being superbly designed and easy to use, now offers categorized properties, built-in constants and enumerations, context-sensitive F1-help, optional parameters and built-in help strings.
With Xceed Zip, applications receive detailed information about the current compression activity, have full control over each file's information as it is being zipped and unzipped and can be consulted by the library when choices need to be made.
Xceed Zip is 100% compatible with the latest PKZip 4.5 zip file format as well as the traditional 2.04g format.
Xceed Zip includes comprehensive online documentation with examples to help you accomplish your tasks effortlessly. Fully commented sample applications are included for many languages. You can copy examples from the help file or samples, paste them into your project, and create a Zip files without writing a single line of code!
Xceed Zip includes complete sample applications, free expert support, and includes the multi-threaded ActiveX component, a DLL interface and an excellent 16-bit support package. It works with VB, VC++,Delphi, C++Builder, Visual FoxPro, ASP, VB Script, and most any other 32-bit Windows developm
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