Recommended and mentioned products
Tails is a Debian based live CD/USB with the goal of providing complete Internet anonymity for the...
Or, if you use the version that comes preinstalled with Tails and you get Tails ONLY from here: https://tails.boum.org/ And again verify the download.
Electrum is an easy to use Bitcoin client.
However, if you get Electrum ONLY from https://electrum.org and verify the signature of the program, then you won't be phished.