The following free, open source software may be useful to those seeking to use tor hidden services safely and anonymously.

	TOR browser Homepage- https://www.torproject.org/ Download page- https://www.torproject.org/download/download-easy.html.en Open source software for enabling online anonymity and resisting censorship.
	GNU Privacy Guard (GnuPG, GPG) Homepage- https://www.gnupg.org/ Download page- https://www.gnupg.org/download/index.html GPL Licensed alternative to the PGP suite of cryptographic software.
	Bitcoin Core (official and most secure client) Homepage- https://bitcoin.org/ Download page- https://bitcoin.org/en/download/ Payment system invented by Satoshi Nakamoto and introduced as open-source software in 2009.
	TAILS Homepage- https://tails.boum.org/ Download page- https://tails.boum.org/download/index.en.html Security-focused Debian-based Linux distribution aimed at preserving privacy and anonymity.
	Pidgin Homepage- https://www.pidgin.im/ Download page- https://www.pidgin.im/download/ Open-source multi-platform instant messaging client.
	Off-the-Record Messaging (OTR) Homepage- https://otr.cypherpunks.ca/ Download page- https://otr.cypherpunks.ca/index.php#downloads Сryptographic protocol that provides encryption for instant messaging conversations. Has a plugin for Pidgin.
	Virtual Box Homepage- https://www.virtualbox.org/ Download page- https://www.virtualbox.org/wiki/Downloads Open source virtualization software package for x86 and AMD64/Intel64-based computers from Oracle Corporation.
	BitMessage Homepage- https://bitmessage.org/ Download page- https://bitmessage.org/wiki/Main_Page Decentralized, encrypted, peer-to-peer, trustless communications protocol that can be used by one person to send encrypted messages to another person, or to multiple subscribers.
	Apache OpenOffice Homepage- https://www.openoffice.org/ Download page- https://www.openoffice.org/download/index.html Open-source office suite.
	Whonix Anonymous Operating System Homepage- https://www.whonix.org/ Download page- https://www.whonix.org/wiki/Download#Download_Whonix Whonix is an operating system focused on anonymity, privacy and security. It’s based on the Tor anonymity network, Debian GNU/Linux and security by isolation.
	Xubuntu Homepage- http://xubuntu.org/ Download page- http://xubuntu.org/getxubuntu/ Community-maintained derivative of the Ubuntu operating system.
	KeePassX Homepage- http://www.keepassx.org/ Download page- http://www.keepassx.org/downloads/ Open source software for storing encrypted passwords.