Open Source Kotlin Package Managers

Universal Installer is a free, open-source Android package manager for installing and managing applications across phones, tablets, Android TV, and Wear OS. It supports APK, APKS, XAPK, APKM, and APK+ packages, including split APK bundles. Users can install applications through Android's standard installer or privileged Shizuku and root methods. Advanced options support silent installation, downgrades, and permission management. VirusTotal integration checks packages for potential malware before installation. The application also handles OBB game data automatically. Built-in tools support application inspection, batch uninstallation, and downloading packages from URLs. Local sharing allows APK transfers through a browser or directly to Android TV.

OSS Review Toolkit (ORT) is a suite of tools designed to automate the process of reviewing and ensuring compliance of open-source software dependencies. It assists in analyzing project dependencies, scanning for license information, and evaluating compliance with customizable policies. ORT supports integration into CI/CD pipelines, making it a valuable asset for organizations aiming to maintain open-source compliance at scale.​

Flicky is a free, open-source F-Droid client designed primarily for Android TV devices and large screens. It provides an alternative interface for discovering and installing applications from the F-Droid ecosystem. Its television-oriented design prioritizes navigation on wide displays rather than conventional smartphone layouts. Users can browse available open-source applications and download compatible APK packages directly to their devices. The application also supports Android phones, although its interface is optimized for televisions. Installation is available through GitHub releases, F-Droid, and manual APK transfers. Built with Kotlin, Flicky provides a dedicated solution for accessing F-Droid applications on Android TV.

Hail is an Android application designed to freeze, hide, suspend, or uninstall applications to reduce unnecessary background activity. It helps users control installed software without permanently removing applications or their data. Freezing can prevent selected apps from launching or performing certain operations until they are restored. Depending on the working mode, applications can be disabled, hidden, suspended, or force-stopped. These operations can help reduce resource consumption and limit unwanted application activity. Hail supports privileged access through Shizuku, root, and Device Owner configurations, with capabilities varying by method. Users can organize applications into a freeze list for convenient management. The application is particularly useful for controlling preinstalled software and temporarily disabling distracting apps.

Let Me Downgrade is an Android Xposed module that allows users to install older application versions over newer ones. It bypasses Android's standard restriction against downgrading installed applications. The module targets Android 12 through 17 and requires a rooted device running a compatible LSPosed framework. Users can enable or disable downgrade support through a dedicated status screen. An optional Quick Settings tile provides faster access to the same control. The module integrates with Android's package installation behavior rather than providing its own application marketplace. It is useful for testing earlier application releases or reverting unwanted updates. Compatibility varies across devices, and modifying system installation controls carries risks, including possible bootloops and application data incompatibility.