Windows software for word and phrase counting, file and email encryption, secure file deletion, calendar date conversion and more

Translate to:
Hermetic Systems publishes Windows software in diverse fields — those above plus others. All these programs are hand-crafted for functionality and ease-of-use. Titles of our programs are shown below (click on any for the full description, user manual, prices and how to order). Or for a quick overview of our products visit our Software Shop.

Word and Phrase Counting, Indexing and Searching, Duplicate File Finding
Hermetic Word Frequency Counter
Scans a docx, text or HTML file and counts the frequencies of different words
Hermetic Word Frequency Counter Advanced Version
Scans multiple docx, text and HTML files and counts the frequencies of different words and phrases
Duplicate Text Finder
Finds duplicate text files in two sets of files
Hermetic MultiFile Search
Indexes multiple docx, text and HTML files for rapid searches for given words and phrases
File and Email Encryption, Secure Deletion, Backup, File Hiding
Cryptosystem ME6
A program for the encryption and decryption of single or multiple files
Data Destroyer
Destroys, by multiple overwrites, data in multiple files and folders
Stego PNG
Hides a data file of any type in a PNG or BMP image file
Backup Modified Files
Backs up new or modified files in a folder and selected subfolders of that folder
Email Encryption End‑to‑End
Encrypts messages to send by email (optionally with attached file) and decrypts encrypted messages (and any attached files)
Calendar Date Conversion in Various Lunar and Solar Calendars
Lunar Calendars and Eclipse Finder
Searches for eclipses, calculates Moon phases, converts lunar calendar dates
Chinese Calendrics
Converts between dates in various Chinese calendars and dates in Western calendars
Julian‑Gregorian‑Dee Date Calculator
Converts between Julian, Gregorian, Dee and Dee‑Cecil calendar dates
Easy Date Converter
Date conversion and date arithmetic for Gregorian, Julian and ISO Week Calendars
Equinoxes, Solstices and Cross‑Quarter Days
Calculates dates/times of vernal/autumnal equinoxes, summer/winter solstices and Celtic cross‑quarter days

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 can be sent immediately upon purchase (or can be obtained immediately after purchase), so there's no waiting required. For some programs you can purchase either a 3-month license, a 1-year license or a perpetual (i.e., lifetime) license. (Site licenses are available for some programs.) Updates to new versions are free, as is tech support for the duration of the user license.

A free 3-month or perpetual single-user license for any one of these programs is available to any student or academic who requests it by writing from an .edu email address (subject to a limit of 3 for any single educational institution).

This website also has many articles about calendars, cryptography and other topics.

Results appear in a new window.

Latest news or addition: A new product, Duplicate Text Finder, to find duplicate text files in two sets of files.

I do believe that Hermetic Systems is the GOLD Standard in customer service and performance!Denise Ventura, January 16, 2008

Website contents © Hermetic Systems 2016