Realplayer? For downloading anime psssh maybe if you want dirt quality flash files.
Streaming anime is easy, but often unreliable, and inaccessible without the internet. While most of the anime I've watched has been streaming anime I much rather prefer downloading anime to enjoy in high quality. Going that extra step to not only get the anime in exponentially higher quality, but also have it available with no loading, internet, or worries is quite worth it. Downloads all the way!