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Obsidian River Software

Chrome Extension Developer & Publisher

Obsidian River Software's Chrome Extensions & Themes Portfolio

Browse the complete collection of Chrome extensions and themes developed by Obsidian River Software. Discover powerful tools, productivity enhancers, and beautiful themes that can transform your browsing experience. Each extension is carefully crafted to provide unique functionality and value to Chrome users.
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    Flash Cards : Multiplication Facts

    Flash Cards : Multiplication Facts

    Flash Cards : Multiplication Facts
    Description
    Flashcards for the student learning multiplication tables
    Flashcards for the student learning multiplication tables
    Users
    10K
    10,000
    1K
    Rating
    2.3
    2.3 out of 5 stars
    11
    11
    Versions
    1
    1 version available for download
    Created
    24 September 2012
    September 24, 2012
    Updated
    22 November 2023
    November 22, 2023
    Removed
    20 July 2025
    This extension was removed on July 20, 2025
    3
    Manifest version 3
    Obsidian River Softw...
    View author page of Obsidian River Software
    Website
    Visit website of coolflashcards.com
    1.6.19
    Version of the extension
    Extension
    195KiB
    Size of the extension
    productivity/education
    View on Chrome Web Store
    View Flash Cards : Multiplication Facts Chrome Extension on Chrome Web Store
    31
    This extension has been viewed 31 times
    0
    This extension has been downloaded 0 times
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    Flash Cards : Division Facts

    Flash Cards : Division Facts

    Flash Cards : Division Facts
    Description
    Flash Cards for the student learning division facts.
    Flash Cards for the student learning division facts.
    Users
    7K
    7,000
    2K
    Rating
    1.5
    1.5 out of 5 stars
    2
    2
    Versions
    2
    2 versions available for download
    Created
    13 October 2012
    October 13, 2012
    Updated
    14 February 2025
    February 14, 2025
    3
    Manifest version 3
    Obsidian River Softw...
    View author page of Obsidian River Software
    Website
    Visit website of coolflashcards.com
    1.6.20
    Version of the extension
    Extension
    111KiB
    Size of the extension
    productivity/workflow
    View on Chrome Web Store
    View Flash Cards : Division Facts Chrome Extension on Chrome Web Store
    42
    This extension has been viewed 42 times
    0
    This extension has been downloaded 0 times
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    Flash Cards : US Presidents

    Flash Cards : US Presidents

    Flash Cards : US Presidents
    Description
    US Presidents Flash Cards
    US Presidents Flash Cards
    Users
    1K
    1,000
    687
    Rating
    5.0
    5.0 out of 5 stars
    2
    2
    Versions
    1
    1 version available for download
    Created
    11 November 2012
    November 11, 2012
    Updated
    18 June 2022
    June 18, 2022
    Removed
    20 July 2025
    This extension was removed on July 20, 2025
    3
    Manifest version 3
    Obsidian River Softw...
    View author page of Obsidian River Software
    Website
    Visit website of coolflashcards.com
    1.6.17
    Version of the extension
    Extension
    96.29KiB
    Size of the extension
    productivity/workflow
    View on Chrome Web Store
    View Flash Cards : US Presidents Chrome Extension on Chrome Web Store
    27
    This extension has been viewed 27 times
    0
    This extension has been downloaded 0 times
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    Flash Cards : Basic Spanish Flashcards

    Flash Cards : Basic Spanish Flashcards

    Flash Cards : Basic Spanish Flashcards
    Description
    Flash Cards for the student learning basic Spanish vocabularys
    Flash Cards for the student learning basic Spanish vocabularys
    Users
    0.9K
    929
    71
    Rating
    3.5
    3.5 out of 5 stars
    2
    2
    Versions
    2
    2 versions available for download
    Created
    10 November 2012
    November 10, 2012
    Updated
    14 February 2025
    February 14, 2025
    Removed
    19 July 2025
    This extension was removed on July 19, 2025
    3
    Manifest version 3
    Obsidian River Softw...
    View author page of Obsidian River Software
    Website
    Visit website of coolflashcards.com
    1.6.20
    Version of the extension
    Extension
    97.85KiB
    Size of the extension
    productivity/workflow
    View on Chrome Web Store
    View Flash Cards : Basic Spanish Flashcards Chrome Extension on Chrome Web Store
    30
    This extension has been viewed 30 times
    0
    This extension has been downloaded 0 times
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    Flash Cards : Periodic Table of Elements

    Flash Cards : Periodic Table of Elements

    Flash Cards : Periodic Table of Elements
    Description
    Flash Cards for the student of the Periodic Table of the Elements
    Flash Cards for the student of the Periodic Table of the Elements
    Users
    588
    588
    4
    Rating
    5.0
    5.0 out of 5 stars
    2
    2
    1
    Versions
    2
    2 versions available for download
    Created
    29 September 2012
    September 29, 2012
    Updated
    14 February 2025
    February 14, 2025
    3
    Manifest version 3
    Obsidian River Softw...
    View author page of Obsidian River Software
    Website
    Visit website of coolflashcards.com
    1.6.20
    Version of the extension
    Extension
    117KiB
    Size of the extension
    productivity/workflow
    View on Chrome Web Store
    View Flash Cards : Periodic Table of Elements Chrome Extension on Chrome Web Store
    51
    This extension has been viewed 51 times
    0
    This extension has been downloaded 0 times
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    FLASH CARDS : CISSP Certification

    FLASH CARDS : CISSP Certification

    FLASH CARDS : CISSP Certification
    Description
    Study Information Security Concepts to pass your CISSP certification exam!
    Study Information Security Concepts to pass your CISSP certification exam!
    Users
    529
    529
    2
    Rating
    5.0
    5.0 out of 5 stars
    7
    7
    Versions
    1
    1 version available for download
    Created
    11 September 2012
    September 11, 2012
    Updated
    25 April 2023
    April 25, 2023
    3
    Manifest version 3
    Featured
    Obsidian River Softw...
    View author page of Obsidian River Software
    Website
    Visit website of coolflashcards.com
    1.6.19
    Version of the extension
    Extension
    116KiB
    Size of the extension
    productivity/education
    View on Chrome Web Store
    View FLASH CARDS : CISSP Certification Chrome Extension on Chrome Web Store
    42
    This extension has been viewed 42 times
    0
    This extension has been downloaded 0 times
    Share on Twitter
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    Flash Cards : Addition

    Flash Cards : Addition

    Flash Cards : Addition
    Description
    Flashcards for studying addition.
    Flashcards for studying addition.
    Users
    438
    438
    7
    Rating
    5.0
    5.0 out of 5 stars
    1
    1
    Versions
    1
    1 version available for download
    Created
    11 November 2012
    November 11, 2012
    Updated
    9 May 2023
    May 9, 2023
    3
    Manifest version 3
    Featured
    Obsidian River Softw...
    View author page of Obsidian River Software
    Website
    Visit website of coolflashcards.com
    1.6.18
    Version of the extension
    Extension
    94.18KiB
    Size of the extension
    productivity/workflow
    View on Chrome Web Store
    View Flash Cards : Addition Chrome Extension on Chrome Web Store
    49
    This extension has been viewed 49 times
    0
    This extension has been downloaded 0 times
    Share on Twitter
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    Basic Russian Flashcards

    Basic Russian Flashcards

    Basic Russian Flashcards
    Description
    Flashcards for the student learning basic Russian vocabulary
    Flashcards for the student learning basic Russian vocabulary
    Users
    402
    402
    5
    Rating
    3.0
    3.0 out of 5 stars
    4
    4
    Versions
    1
    1 version available for download
    Created
    26 November 2012
    November 26, 2012
    Updated
    18 June 2022
    June 18, 2022
    Removed
    19 July 2025
    This extension was removed on July 19, 2025
    3
    Manifest version 3
    Obsidian River Softw...
    View author page of Obsidian River Software
    Website
    Visit website of coolflashcards.com
    1.6.17
    Version of the extension
    Extension
    96.07KiB
    Size of the extension
    productivity/workflow
    View on Chrome Web Store
    View Basic Russian Flashcards Chrome Extension on Chrome Web Store
    21
    This extension has been viewed 21 times
    0
    This extension has been downloaded 0 times
    Share on Twitter
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    PMP Certification Flashcards

    PMP Certification Flashcards

    PMP Certification Flashcards
    Description
    Study Project Management Concepts to pass your PMP certification exam!
    Study Project Management Concepts to pass your PMP certification exam!
    Users
    347
    347
    7
    Rating
    4.0
    4.0 out of 5 stars
    9
    9
    Versions
    1
    1 version available for download
    Created
    15 November 2012
    November 15, 2012
    Updated
    27 April 2023
    April 27, 2023
    3
    Manifest version 3
    Featured
    Obsidian River Softw...
    View author page of Obsidian River Software
    Website
    Visit website of coolflashcards.com
    1.6.19
    Version of the extension
    Extension
    120KiB
    Size of the extension
    productivity/workflow
    View on Chrome Web Store
    View PMP Certification Flashcards Chrome Extension on Chrome Web Store
    48
    This extension has been viewed 48 times
    0
    This extension has been downloaded 0 times
    Share on Twitter
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    Basic German Flashcards

    Basic German Flashcards

    Basic German Flashcards
    Description
    Flashcards for the student learning basic German vocabulary
    Flashcards for the student learning basic German vocabulary
    Users
    175
    175
    4
    Rating
    5.0
    5.0 out of 5 stars
    3
    3
    Versions
    1
    1 version available for download
    Created
    10 November 2012
    November 10, 2012
    Updated
    18 June 2022
    June 18, 2022
    Removed
    20 July 2025
    This extension was removed on July 20, 2025
    3
    Manifest version 3
    Obsidian River Softw...
    View author page of Obsidian River Software
    Website
    Visit website of coolflashcards.com
    1.6.17
    Version of the extension
    Extension
    96.08KiB
    Size of the extension
    productivity/workflow
    View on Chrome Web Store
    View Basic German Flashcards Chrome Extension on Chrome Web Store
    33
    This extension has been viewed 33 times
    0
    This extension has been downloaded 0 times
    Share on Twitter
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    Basic French Flashcards

    Basic French Flashcards

    Basic French Flashcards
    Description
    Flashcards for the student learning basic French vocabulary
    Flashcards for the student learning basic French vocabulary
    Users
    156
    156
    5
    Rating
    1.0
    1.0 out of 5 stars
    1
    1
    Versions
    1
    1 version available for download
    Created
    10 November 2012
    November 10, 2012
    Updated
    17 June 2022
    June 17, 2022
    3
    Manifest version 3
    Obsidian River Softw...
    View author page of Obsidian River Software
    Website
    Visit website of coolflashcards.com
    1.6.15
    Version of the extension
    Extension
    96.05KiB
    Size of the extension
    productivity/workflow
    View on Chrome Web Store
    View Basic French Flashcards Chrome Extension on Chrome Web Store
    48
    This extension has been viewed 48 times
    0
    This extension has been downloaded 0 times
    Share on Twitter
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    Writer's Notebook

    Writer's Notebook

    Writer's Notebook
    Description
    Track character, plot, setting and submissions via this simple Chrome Extension
    Track character, plot, setting and submissions via this simple Chrome Extension
    Users
    63
    63
    3
    Rating
    5.0
    5.0 out of 5 stars
    1
    1
    Versions
    1
    1 version available for download
    Created
    18 February 2020
    February 18, 2020
    Updated
    13 July 2021
    July 13, 2021
    2
    Manifest version 2
    Obsidian River Softw...
    View author page of Obsidian River Software
    1.2.0.1
    Version of the extension
    Extension
    1003KiB
    Size of the extension
    productivity/workflow
    View on Chrome Web Store
    View Writer's Notebook Chrome Extension on Chrome Web Store
    37
    This extension has been viewed 37 times
    0
    This extension has been downloaded 0 times
    Share on Twitter
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    Share on LinkedIn
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    Share on Pinterest
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