Abstract: To enable collaborative budget tracking, a budget tracker application can be downloaded and installed on a plurality of mobile devices that communicate on a peer-to-peer network. The budget tracker application comprises a master budget control module that enables a budget administrator to create a budget plan and advertise the budget plan to potential subscribers. The budget tracker application also includes an expense recording module that enables subscribers to enter expense data and submit the expense data to the master budget control module which records the expense data, updates the budget plan, and publishes any relevant updates to the subscriber devices.

Abstract: The present invention concerns a power saving illuminating device. The device comprises a base, at least one semiconductor luminotron, a DC power source disposed within the base, and a transparent refractive body covered on the opening of the base, said semiconductor luminotron being connected to said power source, wherein said transparent refractive body is full of light reflecting granulae within its body and is positioned in a manner that an end surface thereof is facing the semiconductor luminotron. The device is power saving and may be used as signposts, guideposts, colored lights, decoration lights and illuminating sign plates.