Hermetic Systems publishes Windows software in diverse fields. 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 Share-it for purchase of a time-unlimited user license. For some programs there are time-limited (3-month and 1-year) user licenses. To purchase a time-limited user license, follow the purchase link on the product page for the program. The PayPal link allows purchase via credit or debit card, even if you don't have a PayPal account. The Share-it link takes you to Share-it's payment-processing website, where you can pay via a credit or debit card, via PayPal or in other ways.


Backup Modified Files

US$36.75, €33.45 or £23.95

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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.


Lunar Calendars and Eclipse Finder

US$19.95, €17.75 or £13.75

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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.


Data Destroyer

US$39.75, €35.45, £26.45

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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. Can wipe files in the Windows 7 and 8 Recycle Bin.


Duplicate Text Finder

US$19.95, €18.95 or £14.95

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Duplicate Text Finder is for comparing two sets of text files to find files in one set which are either exact duplicates of files in the other set or nearly exact duplicates (if an initial segment of text is passed over).


HTML Table Creator Tool

US$14.95, €13.45 or £9.95

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This program is an interactive TABLE generator which handles COLSPAN and ROWSPAN, thus enabling creation of complex tables with cells larger than 1x1. Cell specifications can include cell content, font name, font size, color, alignment, etc. A cell specification can be copied to other cells, or all cells in a row or column, thus allowing rapid development of tables.


Hermetic Word Frequency Counter

US$44.75, €39.25, £29.25

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This software scans a file, or text on the clipboard, 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.


Hermetic Word Frequency Counter Advanced Version

US$74.75, €65.45, £48.45

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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.


Julian-Gregorian-Dee Date Calculator

US$14.95, €13.45 or £9.95

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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 vernal equinoxes using either mean or apparent solar time.


Cryptosystem ME6

US$49.95, €44.45, £34.75

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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.


Hermetic MultiFile Search

US$36.75, €33.45 or £23.95

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


MD5 File and Folder Comparator

US$19.95, €17.45 or £13.75

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MD5 File and Folder Comparator is for comparing files as to whether or not they are identical in content. A pair of files may be compared, or all files in two subfolders (optionally including files in their subfolders). Comparison of files in folders may be done to display files which are the same and which are different.


Easy Date Converter

US$19.95, €18.95 or £14.95

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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


Email Encryption End-to-End

US$49.95, €44.45, £34.75

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A program to encrypt a message to send by email, and to decrypt encrypted messages received. Using this 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.


Chinese Calendrics

US$39.95, €35.45, £27.75

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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.


Equinoxes, Solstices and Cross-Quarter Days

US$14.95, €13.45 or £9.95

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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.


Stego PNG

US$29.45, €26.75 or £19.75

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An easy-to-use steganography program which allows you to encrypt and hide a file in a PNG or BMP image file, with the use of a stego key, so that the presence of the hidden file is undetectable, even by software using statistical methods.


These programs run under all versions of Windows from Windows XP to Windows 10. All are completely malware-free (as confirmed by the VirusTotal link on each product page). The free trial versions can be made fully-functional by means of an activation key after purchase of a user license. The key is sent by email immediately upon your purchase (or can be obtained immediately after purchase), so there's no waiting required. (If you do not receive the message, please check your spam folder. To ensure that you can receive that message you could whitelist support@hermetic.ch in your email client.) Updates to new versions are free, as is tech support for the duration of the user license.


This website also has many articles about solar and lunar calendars, cryptography,
computational science and other topics
.


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