Two students of the Indian Institute of Technology, Madras (IIT-M) have developed a wheelchair prototype that allows users to sit, stand and recline too.
The wheelchair, which allows users to manually operate it, has controls for the sitting, standing and reclining functions. It has been designed to allow users to operate it easily. To ensure the user does not fall down when she attempts to lean forward, the device has a provision to strap in the user across the trunk and legs.
You can read more about it here.