LiteShell is a tiny, ultra-fast shell for Windows, designed for slow PCs. It uses very little CPU/RAM. The source is included in the installer and is available as a learning aid. Any changes you make must be made available to me, if you distribute the altered program (this is GPL-compatible). You can email me about [...]

Dynamically Extensible Shell can be configured dynamically depending on application need. User/Developer can extend/reduce shell dynamically by adding /removing module or fine tune shell by adding filter modules over existing core module.
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v1
Documentation
Snapshots

Release Notes
Core shell
Shared object shell
Login shell are available with this release
No 3rd party shells integrated
Plan for next release
more enhanced version with 3rd party [...]