Didn't like the middle one, the hammers were to bland and they made the whole thing a little one-dimensional.
The first and third were okay but I'd blend the colours on the hammer heads a little to soften the look (you don't want to see distinct bands of colour). I'd also stick to just one or two different fonts (one if you go with the first option, use the same font for the entire name) or two if using the last logo (use a different font for the tagline but keep the same one in the circle). Different fonts tend to confuse, telling the eye that the two messages are separate instead of being one name.