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Hermetic Systems publishes Windows software in the areas of word and phrase counting, file wiping, file and email encryption, calendar date conversion and more. All these programs are hand-crafted for functionality and ease-of-use, and have been extensively tested.

This page has, for each of our programs, links to PayPal and to Digital River for purchase of a perpetual (time-unlimited) user license. At Digital River you can pay via credit or debit card, or in other ways. PayPal allows purchase via credit or debit card, even if you don't have a PayPal account.

For some programs there are time-limited (3-month and 1-year) user licenses. To purchase a time-limited user license, click on the program title to go to the product page and follow the 'Purchase' link.

Thumbnail image for program Search KWIC Concordance

Search KWIC Concordance

US$49.95, €45.75 or £38.95

 A program to scan a text file, an HTML file or an MS Word docx file, ignoring stop words, to generate a KWIC (keywords-in-context) concordance which can then be searched for words or word patterns.

Thumbnail image for program Julian-Gregorian-Dee Date Calculator

Julian-Gregorian-Dee Date Calculator

US$19.95, €18.25 or £15.45

 Converts between Julian, Gregorian, Dee and Dee-Cecil calendar dates in various formats, adds/subtracts a number of days, weeks, months and years to/from a given date, and calculates northern spring equinoxes using either mean or apparent solar time.

Thumbnail image for program Cryptosystem ME6

Cryptosystem ME6

US$49.95, €45.75 or £38.95

 A program for the encryption and decryption of single or multiple files for secure storage or transmission. It uses a symmetric key encryption method with a 500-bit key for security, and has numerous safeguards against user error.

Thumbnail image for program Chinese Calendrics

Chinese Calendrics

US$47.95, €43.95 or £37.25

 A program to convert between dates in various Chinese calendars and dates in the Gregorian and Julian calendars, and to find (among other things) lunar new year's day and leap months for any year in the Chinese Calendar.

Thumbnail image for program Lunar Calendars and Eclipse Finder

Lunar Calendars and Eclipse Finder

US$19.95, €18.25 or £15.45

 A program to search for eclipses (lunar, solar, total, annular and partial), to calculate the phase of the Moon at any given date and time and to convert between dates in the Gregorian and Julian calendars and dates in various lunar calendars: Meyer-Palmen Solilunar, Hermetic Lunar Week, etc.

Thumbnail image for program Backup Modified Files

Backup Modified Files

US$29.75, €27.25 or £23.25

 Software to back up files in all (or selected) folders and their subfolders; all files, or just new and modified. Backup operations can be saved in setup files. Program is network-compatible. Can be run via Task Scheduler with optional auto shutdown.

Thumbnail image for program Email Encryption End-to-End

Email Encryption End-to-End

US$49.95, €45.75 or £38.95

 A program to encrypt a message to send by email, and to decrypt encrypted messages received. Using this program ensures that email is encrypted before it is transmitted to your mail server and remains encrypted until after downloading by the recipient. Bilingual: English and German.

Thumbnail image for program Hermetic Word Frequency Counter

Hermetic Word Frequency Counter

US$48.45, €44.25 or £37.75

 This software scans a file and counts the number of occurrences of the different words. The words which are found and displayed can be ordered alphabetically or by frequency. Supports non-English text.

Thumbnail image for program Hermetic Word Frequency Counter Advanced Version

Hermetic Word Frequency Counter Advanced Version

US$79.75, €72.95 or £61.95

 Scans one or more MS Word docx, text or text-like files (e.g. HTML and XML files) and counts the number of occurrences of different words or phrases (optionally with pattern matching). The words/phrases can be displayed alphabetically or by frequency. Works with text in most European languages.

Thumbnail image for program Equinoxes, Solstices and Cross-Quarter Days

Equinoxes, Solstices and Cross-Quarter Days

US$17.95, €16.45 or £13.95

 Software to calculate accurate dates and times for equinoxes, solstices and the Celtic cross-quarter days. The cross-quarter days are those midway between the equinoxes and solstices.

Thumbnail image for program Easy Date Converter

Easy Date Converter

US$19.95, €18.25 or £15.45

 Adds a number of days or months to a date, calculates the number of days between two dates (with or without weekend days), and converts among Common Era (Gregorian) dates, Julian dates, ISO 8601 Week dates, Hermetic Leap Week dates, Julian day numbers and day-in-year dates of the form yyyy-ddd. Bilingual: English and German

Thumbnail image for program Data Destroyer

Data Destroyer

US$39.75, €36.45 or £30.95

 A program for secure file deletion which overwrites data in specified files so that the data cannot be recovered by any means. A single file can be purged or, in batch mode, multiple files. Selected subfolders of a folder can be purged. The user can specify the type of purge. Purge speed can be tested for an estimation of time required. Can wipe files older than a specified date.

Thumbnail image for program Hermetic MultiFile Search

Hermetic MultiFile Search

US$39.95, €36.45 or £31.25

 This software is for indexing docx files, text files, HTML files, XML files or files of a similar type in multiple folders and their subfolders to allow subsequent rapid searching of those files.

These programs run under all versions of Windows from Windows 98 to Windows 10. The software (after download) can be made fully-functional by means of an activation key sent by email after purchase of a user license. Updates to new versions (if any) are free, as is tech support for the duration of the user license.

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