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Built and being built

A decade of building things. Some solved my own problems. Some grew into something more

Matthew Fisher working at a café in Southeast Asia

Rooted Insight

Membership systems for reader-supported independent publishers

2022–now Venture Active

Visit rootedinsight.co →

Active

Index

Not a complete picture, but a fair one. There's more that isn't listed here.

  • 2026–now Tool Active

    VN↔DE Dictionary

    A Vietnamese-German dictionary with pronunciation audio for cross-language learners.

  • 2026–now Software Active

    Math Lab

    An 8-bit mental math training tool.

  • 2026–now Software Active

    Prompt Studio

    An AI prompt generator for various use cases.

  • 2026–now Software Maintained

    Dive Diagrams

    A tool for creating dive diagrams for SCUBA diving.

  • 2025–now Venture Active

    Getting Unlost

    Real travel stories that become unforgettable lessons.

  • 2024–now Tool Active

    Around the World Audio Tour

    Snippets of life from around the world, in audio form.

  • 2022–now Venture Active

    Rooted Insight

    Membership systems for reader-supported independent publishers

  • 2021–now Venture Maintained

    Martha's Visit

    A directory of Martha's Vineyard businesses, activities, and rentals.

  • 2020–now Venture Maintained

    NetworkCalc

    Free IP subnet calculators and APIs for network address, subnet mask, and host range.

  • 2021 Course Archived

    Machine Learning with R

    A machine learning course using the R programming language.

  • 2020–2021 Course Archived

    Statistics with R

    A math and statistics course using the R programming language.