SP Compressor : Great simple compressor

Feature-wise, this compressor comes short compared to most contenders, but sound-wise it doesn't! Some of the more advanced stomp box compressors let you adjust attack and realease times as well as knee shape and such, but I feel that is for studio work. When you're mixing, you'll most often want to compress your guitar signal at that stage anyway, and a surgical compression is thus redundant when recording.

This box let you you blend your uncompressed and compressed signal to your liking, giving you plenty of control in a live situation, as well as making sure you don't overload your recording chain/converter in the studio, if you're recording somewhat hot.

There's an option of high/mid/low setting of the compression itself, which makes a huge impact on your tone.