AnimeFreak.tv (You can watch thousands of anime episodes)
Dubhappy (Loads of episodes of english dubbed anime)
MangaReader (You can read free online manga)
Chrunchyroll (The official website for anime and japanese drama!!!!)
funimation (This is an ACOUNT on YOUTUBE where you can watch full episodes of anime!!!)
All these websites are free of charge.
Youtube is a great place to watch under 15 animes (unless you have an acount therefore you could watch over 15 anime) but you need to know what anime you are looking for. Thats why I've made a short list of some popular,great or quite sad anime which i think are brilliant. I have watched all these anime and I would have put more up but I didnt have time.
Naruto
Inuyasha
bleach
vampire knight (my first anime)
letter bee /Tegami bachi (so sad :( but so awesome)
rosaria+vampire
blood+
chibi vampire
spiral
saiyuki (awesome )
fruits basket (my fave)
uraboku (saddest anime in the world)
shugo chara
claymore
one piece
save me lollipop
la corda d'oro
hayate the combat butler
myself yourself
the tower of druaga
fairytale
11eyes
school rumble
skip beat
omamori himari
school days
miracle train
gakuen alice
chrono crusade
rurouni kenshin
If you need any suggestions of anime like a certain anime just leave a comment saying something like: "I really enjoyed chrono crusade so can you suggest an anime similar to it please"