Alternatives to Citizendium for Windows with any license

  • Wikipedia icon


    Wikipedia is a free, multilingual encyclopedia project supported by the non-profit Wikimedia Foundation. Wikipedia has 17 million...

    Free Windows Web / Cloud Android iPhone Blackberry Android Tablet ... Kindle Fire

  • Encyclopædia Britannica icon

    Encyclopædia Britannica

    The Encyclopædia Britannica is a general English-language encyclopaedia published by Encyclopædia Britannica, Inc., a...

    Commercial Mac Windows Web / Cloud

  • Dixio icon


    Dixio is the solution for all those who care about their language Who want to learn more and enrich their vocabulary: when you...

    Freemium Windows Web / Cloud Android iPhone iPad

  • Oppia icon


    Oppia is a free, open-source learning platform. Full of interactive activities called 'explorations', Oppia helps curious...

    Open Source Mac Windows Linux Web / Cloud Self-Hosted

  • Alchetron icon

    Alchetron is a free social encyclopedia for world where you can create, organize and learn easily using topics. With Alchetron...

    Free Mac Windows Linux Web / Cloud Android Chrome OS ... Android Tablet