whatisgithub

Popular Java repositories on GitHub, each answered in plain English for non-coders: what it is, its tech stack, and how to run it.

• wasabeef/blurryAndroid library for adding blur effects to views and images in one or two lines. Supports overlay mode, captur
• hanks-zyh/htextviewAn Android library that plays animated effects when text in a label changes — fade, typewriter, rainbow color
• jakewharton/u2020A sample Android app demonstrating dependency injection with Dagger and a debug drawer that lets developers sw
• jindrapetrik/jpexs-decompilerJPEXS Free Flash Decompiler lets you open old Flash SWF files and extract images, sounds, fonts, and code from
• tommylemon/android-zblibraryAndroid-ZBLibrary is a Java framework for building Android apps faster using pre-wired MVP base classes with c
• daimajia/androidimagesliderAndroidImageSlider is an Android library that adds a swipeable image carousel to any screen, loading images fr
• tgx-android/telegram-xTelegram X is an alternative Android Telegram client with full source code — you can build it yourself, verify
• alibaba/qlexpressJava scripting engine from Alibaba that lets you run and update business rules like pricing or discount logic
• mik3y/usb-serial-for-androidAndroid Java library for communicating with hardware devices like Arduinos and USB serial adapters connected v
• hongyangandroid/flowlayoutAn Android UI library for displaying tags or chips that wrap onto new lines as they fill available width, with
• alibaba/jetcacheA Java caching library from Alibaba that lets you cache slow method results with a single @Cached annotation.
• baidu/uid-generatorUidGenerator is a Java library from Baidu for generating unique ID numbers across many servers at once without
• cinit/qauxiliaryQAuxiliary is an Android module that adds unofficial extra features to QQ and TIM messaging apps by hooking in
• geysermc/geyserGeyser is a bridge that lets Bedrock Edition Minecraft players join Java Edition servers by translating networ
• caffeinemc/sodiumSodium is a Minecraft mod that replaces the game's built-in graphics rendering with a faster version, signific
• amlcurran/showcaseviewAn archived Android library that places a spotlight overlay on any UI element to guide users through onboardin
• gsantner/markorA free, offline Android note-taking and to-do app that stores everything as plain text files you can sync with
• apache/hbaseApache HBase is a distributed database built to store and access billions of rows of data spread across many s
• nhaarman/listviewanimationsListViewAnimations is a deprecated Android library that added scroll animations, swipe-to-dismiss, and drag-an
• knightliao/disconfA central control panel for your Java app's settings. Change a config once in the web interface and all your r
• killbill/killbillAn open-source billing platform you host yourself to manage recurring subscriptions, process payments, generat
• wuhaoyu1990/magiccameraMagicCamera is an Android camera app that applies more than 40 real-time visual filters to the live camera pre
• liquibase/liquibaseA tool for tracking and applying database structure changes across every environment — dev laptops, test serve
• andkulikov/transitions-everywhereAn Android library that adds extra animation transitions — color changes, rotations, crossfades, text swaps, a
• claritylab/lucidaA self-hosted open-source personal assistant that responds to speech and image queries by routing them through
• karma9874/androratAndroRAT is a client-server remote administration tool for Android devices. A hidden app installed on a phone
• ronmamo/reflectionsA Java library that scans your project's classes and builds a searchable index of metadata, so you can find ev
• tuguangquan/mybatisA copy of the MyBatis Java database library with detailed Chinese-language comments added throughout, serving
• dromara/dynamic-tpA Java library that lets you change thread pool settings while your app is running, with no restarts needed. I
• zq2599/blog_demosA large collection of Java backend and DevOps code examples matching over 600 Chinese-language tutorial articl
• saiwu-bigkoo/android-convenientbannerAn Android Java library that adds a looping image carousel to your app — auto-rotating slides with page indica
• theokanning/openai-javaJava library for calling OpenAI's API — chat, image generation, audio transcription, function calling, and mor
• nisrulz/android-tips-tricksA community-maintained cheatsheet of practical tips, shortcuts, and patterns for Android app development — cov
• kyleduo/switchbuttonAn Android library that adds a smooth, fully customizable toggle switch widget to your app — with more styling
• zlt2000/microservices-platformA ready-made Java backend starter kit for enterprise web apps, bundling login, user management, file uploads,
• etsy/androidstaggeredgridA deprecated Android library from Etsy that displays a Pinterest-style grid where items can have different hei
• saysky/forestblogForestBlog is a complete personal blog system built in Java with Spring, SpringMVC, and MyBatis, aimed at stud
• stleary/json-javaThe original Java library for reading and writing JSON data. Convert JSON text into Java objects and back agai
• hongyangandroid/baseadapterA Java library for Android that eliminates the repetitive adapter code needed to display lists in apps, with b
• google/cameraviewA now-deprecated Google Android library that simplified adding a camera preview to apps — no longer maintained
• cjlin1/libsvmLIBSVM is a widely-used, decades-old library for training Support Vector Machine models that classify data or
• spring-attic/spring-security-oauthThe retired OAuth 1.0a and OAuth 2.0 library for Spring Java apps — now replaced by Spring Security and Spring
• bytedeco/javacppA Java library that lets your Java code call high-performance C++ libraries directly by automatically generati
• 981011512/--A full-featured Java microservices parking lot management system with license plate recognition, mobile paymen
• splware/esprocesProc SPL is a spreadsheet-style programming language and IDE for data processing that combines SQL querying
• hansonwang99/spring-boot-in-actionA Chinese tutorial series with runnable Spring Boot code examples covering databases, caching, monitoring, sec
• jgilfelt/chuckA debugging tool for Android developers that records every network request and response made by an app during
• ant-media/ant-media-serverA self-hosted video streaming server that takes live video from a camera or encoder and delivers it to viewers
• bepass-org/oblivionAndroid app that routes your internet traffic through Cloudflare WARP using WireGuard, giving you a private, f
• heeexy/springboot-shiro-vueA reference implementation for a permission management system with a Spring Boot backend and Vue frontend, whe
• discord-jda/jdaA Java library for building Discord bots that handles the platform's real-time events, API rate limits, and ca
• pardom-zz/activeandroidActiveAndroid is a Java library for Android that lets you store and retrieve database records by calling metho
• zongzibinbin/mallchatA Java backend combining real-time group chat and an online shopping platform, built to production-grade stand
• linhaojun857/auroraA full-featured personal blog system built in Java with a polished public frontend and a separate admin dashbo
• calebfenton/simplifyA command-line Java tool for Android security researchers that deobfuscates APK files by executing them in a v
• rememberber/wepushA Java desktop app for sending bulk messages across WeChat, DingTalk, Chinese SMS providers, and email, with v
• wdullaer/materialdatetimepickerAn Android library that adds a Material Design date picker and time picker to your app with extensive theming,
• chewiebug/gcviewerA desktop tool for Java developers that reads JVM garbage collection log files and displays them as charts sho
• romandanylyk/pageindicatorviewA small Android library that adds animated dot indicators to swipeable screens, showing users which page they
• yasserg/crawler4jA Java library for building multi-threaded web crawlers that lets you define which URLs to follow and what to
• gabrielemariotti/cardslibAn Android library from 2013-2014 that simplifies building card-style UI panels, adding pre-built behaviors, d
• netflix/ribbonJava library by Netflix for client-side load balancing and fault-tolerant communication between cloud services
• redspider1/concurrentA community-written series of articles in Chinese covering Java multithreading and concurrency in depth, struc
• apache/rocketmq-externalsA community hub for Apache RocketMQ add-ons and integrations — including a monitoring dashboard, Kubernetes op
• objectbox/objectbox-javaObjectBox is a fast, easy-to-use database for Android, Java, and Kotlin apps that lets you store and retrieve
• hussien89aa/androidtutorialforbeginnersA complete beginner Android development course in Java: 17 full apps built from scratch including a calculator
• jz-darkal/androidhttpcaptureAn Android app that intercepts and records all HTTP and HTTPS network traffic on your device so you can inspec
• h2database/h2databaseH2 is a lightweight Java database engine that runs embedded inside your app or as a standalone server, with no
• 201206030/novel-plusNovel-plus is a ready-to-deploy website platform for hosting and reading online fiction, with reader portals,
• puniverse/quasarQuasar is a Java library that adds lightweight fibers, message-passing channels, and actors so you can write p
• asamk/signal-cliA command-line tool that lets you send and receive Signal encrypted messages from a terminal or server script
• chentao0707/simplifyreaderA 2015 Android demo app built in Java showing a news reader, image browser, video player, music player, and QR
• jacoco/jacocoJaCoCo is a free Java library that measures test coverage — it tracks which lines, methods, and branches your
• zhanghai/douyaDouya is an open-source Android app that gives the Chinese Douban social platform a polished Material Design i
• tiann/epicAn Android library that lets you intercept and modify any Java method at runtime — before it runs, after it ru
• go-lang-plugin-org/go-lang-idea-pluginA now-deprecated community plugin that added Go language editing support to JetBrains IDEs before an official
• danielzeller/depth-lib-android-An Android Java library that adds 3D depth illusions, realistic shadows, particle effects, and wave animations
• phishman3579/java-algorithms-implementationA readable collection of classic algorithms and data structures in Java — covering sorting, graphs, trees, and
• javagrowing/jgrowingA community-maintained learning roadmap in Chinese that maps the full path for Java developers to grow from be
• square/sqlbriteA lightweight Android library (now archived) that wraps SQLite with RxJava so your app automatically refreshes
• iot-technology/iot-technical-guideA Chinese-language learning guide for building IoT platforms from scratch, covering Java and networking founda
• freeyourgadget/gadgetbridgeGadgetbridge is a privacy-first Android app that connects your smartwatch or fitness tracker directly to your
• jdamcd/android-cropA deprecated Android library from SoundCloud that adds image cropping to mobile apps, based on the original AO
• alibaba/dexposedAn Android library from Alibaba that lets you intercept and modify Java method calls inside a running app at r
• azkaban/azkabanA server-based workflow manager originally built at LinkedIn for scheduling and sequencing data pipeline jobs,
• castorflex/smoothprogressbarAn Android library that replaces the plain default loading bar with smooth, customizable horizontal or circula
• flipboard/bottomsheetAn Android library from Flipboard that adds a slide-up bottom panel to your app, with pre-built components for
• snailclimb/guide-rpc-frameworkA Java learning project that builds a simplified RPC framework from scratch using Netty, Kryo, and Zookeeper,
• mcxtzhang/swipedelmenulayoutAn Android library that adds swipe-to-reveal action buttons to list items — like the delete or archive menus i
• blossom-editor/blossomA self-hosted Markdown note-taking app you deploy with one Docker Compose command — your notes, images, and pl
• helidon-io/helidonHelidon is Oracle's open-source Java library set for building lightweight microservices and web APIs, powered
• sunfusheng/marqueeviewAn Android library that displays scrolling text banners in any of four directions — like a news ticker or anno
• timehop/sticky-headers-recyclerviewAn Android library that makes section headers in a RecyclerView stick to the top of the screen as you scroll,
• zhpanvip/bannerviewpagerAn Android library for building auto-scrolling image carousels (banners) with swipe gestures, page indicators,
• netflix/maestroNetflix's open-source workflow orchestration platform that schedules and runs large-scale data and ML pipeline
• mpusher/mpushAn open-source Java server for pushing real-time notifications directly to mobile devices over persistent conn
• apache/kylinAn open source SQL analytics engine that makes billion-row queries on Hadoop data return in seconds instead of
• atmosphere/atmosphereA Java framework for building AI agents with a single @Agent annotation — it handles streaming tokens to clien
• lygttpod/supertextviewSuperTextView is an Android library that packs multi-position text layout, icons, checkboxes, rounded corners,
• camerakit/blurkit-androidAn Android library that adds real-time frosted-glass blur effects to any area of your app screen, controlled t

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