The best free key macro download??

Can anyone advise me on the best (smallest, neatest, simplest) key macro utility I can download for free or very little cost?

I want to do simple things like assign my email address so that I can input it quickly in any application and the same with paragraphs of text.

I've looked at a lot but they all seem to be overcomplex, take too many system resources or are too intrusive.

Any ideas?