Secure Swiss-based email with end-to-end encryption and zero third-party access. Available across devices, offering a free version to promote privacy.
Pidgin is a chat program which lets you log into accounts on multiple chat networks simultaneously. This means that you can be chatting with friends on XMPP and sitting in an IRC channel at the same time.
FlowCrypt (formerly CryptUp) is the easiest PGP encryption for Gmail. It behaves just like standard email, except it's encrypted.
An open-source decentralized and encrypted messaging app even without internet connection via Wi-Fi and Bluetooth. Messages are stored securely on your device, not in the cloud. Connect directly with nearby contacts - no Internet access is required.
Disroot is a platform providing online services based on principles of freedom, privacy, federation and decentralization.
Mailvelope is a browser extension that allows to exchange encrypted emails following the OpenPGP encryption standard.
Cross-platform email client providing POP/IMAP support, robust filtering, multiple accounts, and chat. Extendable via add-ons with RSS/Atom, etc.
Chat "off-the-grid" with people around you – even if there is no Internet connection or mobile phone coverage.
Create unlimited disposable email adresses on the go and forward them to your main email adress, with this free and open-source solution.
Forget about spam, advertising mailings, hacking and attacking robots. Keep your real mailbox clean and secure. TempMail provides temporary, secure, anonymous, free, disposable email address.
Temporary disposable e-mail service to beat spam. Avoid spam with a free secure e-mail address.
MailDrop is a free throwaway e-mail address. It's temporary. It's transient. It's disposable. It's meant for those times when you don't want to give out your real address. Just give someone any e-mail address in the maildrop.
Create a free disposable email address! Its really easy to use: Create a new email address on trashmail.net. All mails to this address will be forwarded to your real email address for a number of times you can set up on the following form. When the limit is reached, the Trashmail.
Jitsi Desktop (previously SIP Communicator) is a legacy audio/video and chat communicator with full encryption, precedessor of 
Jitsi Meet .
Go ahead, video chat with the whole team. In fact, invite everyone you know. Jitsi Meet is a fully encrypted, 100% open source video conferencing solution that you can use all day, every day, for free.
End-to-end encrypted app for email, calendar, and contacts, requiring no personal data, with open source code and quantum-resistant security.
It's time to get stuff done with the Yahoo Mail app. Get organized with the help of the Mail app.
Experience instant messaging with remarkable speed and robust security. Join massive group chats or channels. Enjoy free and advanced features.
Offers group video calls, voice calls, and instant messaging with photo sharing, real-time notifications, and location mapping for seamless connectivity.
