Clixsense.com This site has been around for a long time, since 2007 I believe. Their cash out is at $8.00, not too bad. Besides clicking on ads you can also earn money by doing tasks, completing offers, and they have a something called a clixgrid. You get to click up to 25 times a day and can win prizes anywhere from 10 cents up to $5.00. I have won many times on the clixgrid but only won the $5.00 prize once. I have never had any issues with clixsense.com and highly recommend them.
Neobux.com This paid to click site has also been around a long time, since 2008 I think. The coolest thing about Neobux is they have instant payments and they have a low cash out.
Hits4pay.com This site is cool because instead of one cent or less per click, you get 2 cents per click and always 2 cents per click. There are many site that offer 1 dollar or 5 dollars per click and they are all scams. They sound too good to be true because they are too good to be true. You should stay away from these kind of sites. Hits4pay however is legit and really does pay 2 cents for every ad you visit. They do have a very high payout at $25 dollars but if you build up a list of refferals you can get paid a lot faster. I have made it to payout without using referrals before so it can be done. It just takes patients. Despite the big payout mark I still love Hits4pay.
cashnhits.com This is another great ptc site. I haven't belonged to them long but I have allready been paid twice by them and they have already got my trust. There are many different kinds of ads you can view with cashnhits. They have regular ptc ads, video ads, and Facebook ads. You can also earn by completing offers as well. I really like the auto-surf because it's the most pain free way to earn with them. You should definitely check them out!
wordlinx.com I have been a member of wordlinx for a while now, since 2008. They have paid me many times and I haven't had any problems with them so far. They have a payout at $10 which isn't too bad. The problem is that they don't have as many ads as other ptc sites so it takes a bit longer to reach payout with out referrals. Of course that's a good incentive to start building a referral list. I don't place them as my number one ptc site but they are honest and steady with ads.