The Sweet Spot Miner (Official Magi site mirror, out of date) is a program (written in Delphi, I think?) that manages your hashing power (so you don't waste energy mining when the rewards are low). From the link above:
- to hide the miner window so it will not waste your taskbar space.
- to hide itself into the system tray while running.
- to start the miner at LOW priority so the miner will not slow down your work.
- to check the current Network Hashrate and control the miner CPU usage targeting the Sweet Spot 22MH/s the Hash Rate you choose.
- to check the current Block Value and control the miner CPU usage targeting 12+XMG/Block the Block Value you choose.
And here's a screenshot of the interface, if you're curious: