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Learning Languages
- VocTrain  (vocabulary German/French/English or German/Spain)
- VerbTrain  (English irregular verbs)
- KonjugationsIgel   (German and French conjugation trainer)
  (German, French, Spanish, Italian and/or Portuguese conjugation tool)
- Conjugation tables  (French, 144 verbs)
CalcTrain  (free math trainer)
small travel vocabulary (pdf)
Unit converters


Unit converters
Sunset calculation
Conjugation tables
- French
- German
- Spanish
- Italian
- Portuguese
- English
- Dutch
Number plates

About Cactus2000

Collection of unit converters for offline use

- Download - Order -

This collection enables you to install the Cactus2000 unit converters on your computer. You don't need to be online for access.


  • The Cactus2000 unit converters enable quick and easy conversion of physical units.
  • More than 90 converters are available. Besides physics there are also converters for chemistry, meteorology, geometry and other useful tools. Umrechner-Index
  • These are the same converters as on the website. You can try out the converters on the website.
  • The offline converters use smaller windows, allowing you to simultanously display other applications.
  • Allows copy and paste for use with other applications such as word processing software.
  • You can open more than one converter at a time (picture above).
  • There is an index (picture on the right) for choosing a converter.
  • An offline test version is available for download. This evaluation version contains the area and temperature converters.
  • The only system requirement is a browser with JavaScript enabled.
  • English, French and German versions available.
  • You can order the full collection for €15. You will quickly recieve the collection via email.

    If you have questions or suggestions please write us an email. We will try to answer as soon as possible.

    Free download of the evalution version
    Order the full version


    Bernd Krüger, 2015