Wikipedia has a list of many of the spells; search for "Harry Potter Spells". Several fansites also list the known spells; for example, the Harry Potter Lexicon (hp-lexicon.org). Please note that none of the spells work in real life; they are part of a fantasy story. Also, not all details about each of the spells are known; the sites mentioned, and others, only list details that appear in the books, for example, the exact words to say, if it has been mentioned in the books.
Obviously, the first place to find Harry Potter saying his spells is in the seven books in the series, in the dialoge.
The second source for spells and such would be the website muggle.net. Here, you can find almost everything related to Harry Potter: the books, the movies, news about characters, fan events, news about upcoming movies, facts or more-in depth information about the books, and a place to share your opinion on anything about the wizarding world that interests you.
Lastly, if you'd like to acually hear Harry Potter saying spells, you could go to YouTube.com and search the movies. Some good ones are "accio" - the summoning charm, "avada kadavra" - the killing curse, "engorgio" - the charm that inlarges things, "expecto patronum" - the charm that creates a patronous.
If you actually want to hear Harry Potter himself say spells, I suggest waiting for your owl to hogwarts. :)
offensive spells
incendio
confringo
stupefy
expellarmus
petrifacus totalous
sespensortia
morsmorchre
three unforgivable curses
imperio
crucio
avandia kedabra
defencesive spells
protego
aguamenti
non-dueling spells
alohomora
lumos
expecto patronem
orchideous
reparo
wingardem levousa
oclious reparo
oblivate
The Harry Potter Wikia is a very helpful source for all things Harry Potter
pottermore.com is awesome, harrypotter.warnerbros.com is good, and durmstrang is fun
Well, you can always go to IMBD.com I always use it, because not only does it have a list of the actors; but it also has info on them.
mugglenet.com
Answers.com has summaries of the Harry Potter books. Other good websites are MuggleNet and the Harry Potter Wikia.
One can purchase a Harry Potter Sorting Hat from various websites like Amazon or eBay. Both websites offer a great amount of products, including a Harry Potter Sorting Hat.
There are a number of online shops that offer Harry Potter apparel. Some of the sites are Universal Orlando (which offers a wide selection), Zazzle and Alivans.
This website has one. See related questions.
mugglenet.com
There are lots of Harry Potter websites. Such as Mugglenet, Leaky Cauldon and of course the official Pottermore. There are countless numbers of Harry Potter Role Playing Games and even more fan fictions. See the Related Links for Harry Potter websites.
There are several free websites about Harry Potter.
You could try some of the websites in related links.
Answers.com has summaries of the Harry Potter books. Other good websites are MuggleNet and the Harry Potter Wikia.
One can purchase a Harry Potter Sorting Hat from various websites like Amazon or eBay. Both websites offer a great amount of products, including a Harry Potter Sorting Hat.
There are many Harry Potter RPGS (virtual games) out there. All you need to do is preform a search.
See related links.
The price range of a Harry Potter scarf on the official Harry Potter shop website is $15 to $30. Harry Potter scarves can also be bought from other websites like amazon or ebay for $5 to $40.
There are a number of online shops that offer Harry Potter apparel. Some of the sites are Universal Orlando (which offers a wide selection), Zazzle and Alivans.
This website has one. See related questions.
Most any bookstore or even on websites. Harry potter is a pretty big series, so most any where.