.: What's on the Hermetic Systems Website :.

Text Analysis Software   Encryption and Security   C/C++ Programming
Calendar Software   Calendar Studies   Computational Science

This website provides free software and not-free software, plus many articles on calendars and other subjects. Listed below are partial contents of the main sections (click on the section headings to see the entire contents of each section).

Visit our Software Shop for descriptions of our software products.

Text Analysis Software
  • Search KWIC Concordance
    A program to scan a text file or an MS Word docx file, ignoring stop words, to generate a KWIC (keywords-in-context) concordance which can then be searched.

  • Hermetic Word Frequency Counter
    Scans a text file or a Word docx file and counts the occurrences of different words. The words found can be displayed alphabetically or by frequency.

  • Hermetic Word Frequency Counter Advanced Version
    Scans one or more docx, text or text-like files (e.g. HTML and XML files) and counts the occurrences of different words or phrases (optionally with pattern matching).

  • Hermetic MultiFile Search
    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.

Encryption and Security

  • Cryptosystem ME6
    An encryption program which uses a symmetric key encryption algorithm (with 500-bit keys) to encrypt information in files for secure storage or transmission.

  • Email Encryption End-to-End
    A program for sending and receiving encrypted email messages (optionally with attached file). It uses a symmetric key method and works with any email program. Bilingual, English/German.

  • Data Destroyer
    A program to wipe single or multiple files, that is, to overwrite their contents so that the data in them cannot be recovered.

  • Backup Modified Files
    Backs up all files in selected folders and subfolders, or just new and modified files.

Calendar Studies

Calendar Software

  • Easy Date Converter
    A conversion program which gives you the day of the week for a date, the Julian day number and more, and allows date arithmetic: adding a number of days to a date, etc., with or without inclusion of weekend days. In English and German.

  • Equinoxes, Solstices and Cross-Quarter Days
    For calculating accurate dates and times of equinoxes, solstices and the Celtic cross-quarter days for any year in the range 1 CE through 3000 CE (for both hemispheres).

  • Lunar Calendars and Eclipse Finder
    Software for conversion among dates in the Common Era and Julian Calendars and dates in several lunar calendars. The program also finds the dates, times and durations of solar and lunar eclipses.

  • Chinese Calendrics
    Software for converting between Chinese and Western dates and for obtaining other information such as the dates of Chinese New Year's Day for any year.

  • Julian-Gregorian-Dee Date Calculator
    Converts between Julian, Gregorian, Dee and Dee-Cecil calendar dates in various formats, and adds and subtracts a number of days, weeks, months and years to or from a given date.

  • Mayan Calendrics
    Converts among Maya and European dates in various calendar systems. In English and German.

  • Identical Calendar Years
    How long do you have to wait before you can re-use that old wall calendar that you like so much?

  • Printable Calendar
    A modest utility to help you keep track of things to do.

  • Printable Hermetic Lunar Week Calendar
    Same same but different.

Computational Science

C/C++ Programming

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