Tachiyomi

Tachiyomi was a free and open-source manga and comic reader application for Android devices. It was developed by Inorichi and released in 2014. The name "Tachiyomi" is derived from the Japanese words "tachi" (立ち) and "yomi" (読み), meaning "standing" and "reading,"

Features
Tachiyomi offers a range of features. It supports multiple source extensions, allowing users to access manga from various online platforms. Users can create customizable libraries to organize their manga collection based on genres, authors, or reading progress. The application provides different reading modes, including single-page, double-page, and long-strip scrolling. Users can customize the app's appearance, layout, and reading controls. Tachiyomi allows users to download manga chapters for offline reading. Integration with tracking services such as MyAnimeList enables users to track their reading progress and synchronize data across multiple devices.

Development
Tachiyomi is an open-source project hosted on GitHub, allowing developers to contribute to its development and improvement. Due to its open-source nature, Tachiyomi has many specialised forks.

Cease and desist from Kakao Entertainment
On January 2024, the developers of Tachiyomi received a cease and desist letter from a South Korean company Kakao Entertainment, demanding them to destroy the project and all of its forks. In response of the demands, the project's core developers have announced that the core version of the app will not be under active development and the project's repositories will be removed, following the cessation of providing source extensions for the app.

Multiple open-source developer teams have aimed to 'take up the mantle' and create successor apps following the cease and desist, such as Mihon.