http://www.coinchoose.com/ for how many coins are currently generated per day (as a target). You will have to multiply the reward column with number of blocks per day also to get the daily average generated.
https://vircurex.com/welcome/index?locale=en On the bottom here you can see the hashrate for the different coins, that just tells you how much computing power now are engaged in mining. You can only compare coins with similar block chain algorithm in this way (for relative market value the newly mined coins).