You will find some of Rilke’s poems here, and all the Duino Elegies. I also wrote a short book about Rilke that you can get from Amazon.
The texts are mostly in German; if possible I will add translations as well. You can find a translation of the Duino Elegies into English here, but it’s not very satisfactory. The German website www.Rilke.de has a comprehensive collection of his poetry in German.