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Bili23-Downloader is an open-source, free, cross-platform desktop downloader for Bilibili, developed and maintained by Scott Sloan. It supports Windows, Linux, and macOS, with a Fluent Design interface, light and dark themes, multithreaded downloads, resumable transfers, automatic retries, bandwidth limits, proxy configuration, clipboard monitoring, and multilingual UI support. The application parses videos, series, films, courses, interactive videos, music, user spaces, favorites, watch history, playlists, and related Bilibili collections. It can select video and audio qualities and codecs, preview media before downloading, save danmaku and subtitles in formats including XML, ASS, JSON, SRT, LRC, and TXT, preserve cover images, write chapter and NFO metadata, and package output as MP4 or MKV. It also provides configurable naming and directory rules, duplicate-download detection, account login through QR code, SMS verification, or cookies, and optional embedding of ASS danmaku or subtitles into MKV files. The project is released under the GPL-3.0 license.

BiliTool is an open-source tool for automating recurring activities on Bilibili across one or more accounts. It runs scheduled tasks through Bilibili's APIs and provides a web panel for managing accounts, configuration, schedules, and execution logs, as well as a console host that can be paired with an external scheduler. It supports QR-code login and cookie updates, multiple accounts, daily experience activities, live-room lotteries and fan-medal tasks, manga check-ins and benefits, VIP activities, silver-to-coin exchanges, B-coin voucher charging, batch unfollowing, cookie checks, and optional notifications. Tasks can be enabled and configured independently, with eligibility and availability controlled by Bilibili's current services. The project supports Docker, Podman, Helm/Kubernetes, Qinglong and other automation panels, local execution, Tencent SCF, Krew, and an archived GitHub Actions deployment recipe. It stores accounts in the web panel database, automation-panel environment variables, or a local cookies file depending on the host. The README describes it as intended for learning and testing and warns users to protect cookies and other credentials and comply with Bilibili's terms.

Bangumi is an unofficial mobile client for the bgm.tv media-tracking and discussion site, built with React Native for iOS and Android. It manages progress for anime, music, Japanese dramas, games, and visual novels, and provides mobile interfaces for entries, characters, timelines, posts, user spaces, searches, rankings, calendars, tags, logs, groups, and other site sections. The client adds features beyond the website, including limited synchronization from bilibili and Douban, a CDN-backed data layer for cover images and static data, episode-level streaming-source information, local folder management with Romanized-title scraping, image previews, word clouds, recommendation and related-series views, filtering rules, user blocking, and several specialized browsing and game-like interfaces. It does not provide media downloads, direct playback, or modification, according to the project disclaimer. The project is distributed as an Android application and through available iOS sideloading methods; its README says Google Play distribution is suspended and that iOS App Store resubmission is not planned. The repository describes the code as intended for learning and noncommercial use.

BongoCat is a native animated desktop companion that reacts to keyboard, pointer, and gamepad input. It is built in C and C++ with SDL3 and OpenGL, supports Windows, macOS, and Linux, and processes keyboard and mouse input locally rather than recording or uploading it. The runtime uses platform-specific input listeners, an atomic input queue, an SDL3 main loop, model-parameter updates, and OpenGL composition for the pet window and overlays. It includes built-in model assets and supports external model sources, including Mver packages, Tauri sources, `.model3.json` files, and image patches. Live2D rendering uses the Cubism SDK when available; without it, the project builds a diagnostic backend. The source code and native runtime are licensed under AGPL-3.0-only, while the default model mode and bundled model assets have separate MIT licensing.

Plezy is an open-source cross-platform client for Plex, Jellyfin, and Emby, built with Flutter for desktop, mobile, and TV. It provides library, collection, playlist, watchlist, recommendation, and cross-server search views, along with media playback supporting direct play or transcoding, HDR and Dolby Vision, multiple codecs, customizable subtitles, playback progress synchronization, and external players. The client also supports music playback, offline downloads, live TV and DVR, synchronized watching, and integrations with services including Trakt, MyAnimeList, AniList, Simkl, and Seerr.