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There's no free Internet where you can use a pc that I'm aware of, although I do think there's several wireless networks to log on to but I don't know if they're free or how to get on them, although I believe McDonalds offers free wireless access and some coffeeshops do too. In public libraries there's usually more than enough internet pc's available but they charge I think it's €0,70 per 15 minutes or something like that...
There's a bunch of sites that offer free sms but they're not really free I think and apparently some claim to be free but send you a bill later anyway... I did a quick google and immediately got sent a trojan...
I hope this answers your question, if not, please be more specific...