NanoMD is a lightweight Markdown editing and viewing library built on pure JavaScript and native APIs. Can be easily embedded into websites, offers rich features, and supports real-time previewing.

FlexPlyr is a modular player that supports YouTube, Vimeo, as well as local video and audio files. It allows customization of control button types, arrangement, and optional panel styles.

RenderJS is a lightweight tool focusing on extending JavaScript native object prototypes, providing powerful DOM manipulation and data processing methods. It enhances development efficiency.

(integration) pdf2image is a lightweight JavaScript library to convert PDF pages into images (PNG, JPG, WebP) with real-time progress tracking and optional ZIP compression.