OMN-Go

OMN-Go is an open-source personal wiki and note application for Android. It stores notes as plain Markdown files with a small header containing information such as the title, date, and tags. The application runs a small local web server on the device and presents the notes through a browser-style interface. It does not require an account, a cloud service, or a third party to keep working.

OMN-Go includes a built-in Markdown editor and can also work with a preferred external text editor. Each note is compiled into a static HTML page, with support for ordinary relative or absolute links between pages. The automatically generated Tags page indexes notes by their tags and works offline. Math formulas can be enabled per page through KaTeX, while fenced code blocks receive automatic syntax highlighting.

For capturing information, OMN-Go provides a quick-note box that opens with one press and a bookmark collector, and both can receive content through Android’s share-to-application function. Optional git synchronization over SSH can keep notes current across devices running OMN-Go, while conflicts are shown clearly for manual merging or a safe pull or push. An embedded SQL database lets note scripts read and write data directly, and its contents can be backed up at any time, with the backup tracked by git and saved alongside the notes. LAN sharing is disabled by default, but when enabled it allows other devices on the same network to access notes over HTTP with a password.

On Android, notes can optionally open a system settings screen, start another application, or run a Termux command through intent: URI links, with this function disabled by default. Light, dark, and system-following themes are available, along with Material Design icons and small HTML or JavaScript building blocks that can be placed in notes. OMN-Go also runs on desktop systems, with Linux and Windows builds available. As an Android entry in the Developer Tools category, it combines local Markdown-based documentation, optional device synchronization, and Android-specific actions without depending on a hosted account. MirrorNest mirrors the official build directly on its own storage and scans it for malware before publishing.