Browse free open source Java Hobbies Software and projects below. Use the toggles on the left to filter open source Java Hobbies Software by OS, license, language, programming language, and project status.

  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

    You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
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  • Automate contact and company data extraction Icon
    Automate contact and company data extraction

    Build lead generation pipelines that pull emails, phone numbers, and company details from directories, maps, social platforms. Full API access.

    Generate leads at scale without building or maintaining scrapers. Use 10,000+ ready-made tools that handle authentication, pagination, and anti-bot protection. Pull data from business directories, social profiles, and public sources, then export to your CRM or database via API. Schedule recurring extractions, enrich existing datasets, and integrate with your workflows.
    Explore Apify Store
  • 1
    Find The Gummy

    Find The Gummy

    Can you find the gummy bear?

    Kids, can you find the hidden gummy bears? There are five different levels, five different gummy bears to find in all. Gummy bears are placed at random for added replay value. See if you can find the hidden gummy bears!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 2
    JSUDOKU
    JSudoku is a Java version of the game Sudoku. A backtracking algorithm cares for random puzzles and based on the Sudoku-Puzzle JavaScript. Optionally, JSudoku generates X-Sudoku puzzles.
    Downloads: 0 This Week
    Last Update:
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  • 3
    MMM jLauncher
    This project is about creating a portable launcher for the Maniac Mansion Mania Fangame-Project.
    Downloads: 0 This Week
    Last Update:
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  • 4
    PJTimer - Mobile Speedcubing App

    PJTimer - Mobile Speedcubing App

    All-in-one speedcubing app for Java-supported mobile phones

    PJTimer is an open-source, all-in-one mobile speedcubing app, based on desktop speedcubing app like the CalCubeTimer(CCT) and Prisma Puzzle Timer and the web-based ones like the CubeTimer.com, CubeMania.org and qqTimer.net.
    Downloads: 0 This Week
    Last Update:
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  • Atera all-in-one platform IT management software with AI agents Icon
    Atera all-in-one platform IT management software with AI agents

    Ideal for internal IT departments or managed service providers (MSPs)

    Atera’s AI agents don’t just assist, they act. From detection to resolution, they handle incidents and requests instantly, taking your IT management from automated to autonomous.
    Learn More
  • 5
    Save The World

    Save The World

    Save The World (Hangman Alternative with Optional Custom Phrases)

    Earthling... You have been chosen to save the world from the alien forces that are trying to destroy our planet! To save our planet from the attacks, you must use your superior intellect to solve the word puzzles to fight off the alien invaders! If you guess correctly, the blank will be replaced with the letter. If you guess incorrectly, the alien invaders will be one step close to our planet! You are allowed five mistakes before the alien invaders destroy our world. If you use the HINT button, this will give you a correct guess, but will allow the invaders one step closer. In victory, the Hero will be awarded the number of remaining guesses as points. In defeat, the Hero will lose five points. Quitting during a round will result in an automatic loss. Good luck, Earthling! The fate of the world is in your hands...
    Downloads: 0 This Week
    Last Update:
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