OpenMW Mod Manager on GitHub.
Features include:
- A simple user-interface that displays data repositories scattered across various locations.
- The ability to disable/enable data repositories with a quick click.
- The ability to quickly add data repositories through the native file system.
- Recognition of mod sub-components for complicated data.
- Conflict detection, to show how the order of data repositories matters.
- Detailed conflict reporting.
- Enabling/disabling content without using the OpenMW launcher.
- Enabling/disabling BSAs without using the OpenMW launcher.
- Updating conflict detection to compare to BSAs.
- Interfaces to other tools.
The tool only works on Windows at the moment, as I don't have a Linux install of OpenMW right now.