
Description: Kakugo is a free and open-source app that helps learn Japanese vocabulary, kanji, and grammar. It uses spaced repetition and a clean, intuitive interface to make studying Japanese efficient and enjoyable.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Nimonikku is a free, open-source Android app for browsing and downloading content from the manga and comic hosting site nhentai.net. It provides an ad-free interface and additional features compared to the web version.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API