Guitar Tuner is a simple interactive app which can determine the exact pitch of your guitar strings by using a microphone and a sound card. It can also work without a microphone. As a last resort you can plug headsets into the microphone input. It works with most sound cards.
If you think you can tune your guitar exactly using only reference tones, you are wrong
SunVox is a small, fast and powerful music sequencer with modular synthesizers. It is a tool for those people who want to compose music anywhere. Modular interface. Highly optimized synth algorithms. Flexible architecture: SunVox can working on various devices