Trustworthy url address for bitcoin download? I would like to download install some bitcoin software and create a wallet. I know there are some programs like Bitcoin-QT or Multibit. There are more sources to download these programs. I want to be sure, I downloaded the right one.

Which software from which url is trustworthy? Can I check the checksum of the downloaded installer of specific version against some MD5 from a list somewhere, that it is safe?
http://bitcoin.org/en/download is the official download page for bitcoin-qt, it is the oldest client, the most trustworthy and it is the client I would recommend for a beginner.

The same client can also be downloaded from the Bitcoin Core website, here: https://bitcoincore.org/en/download/