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Available on web, iOS, Android, and desktop, Proton Mail is an encrypted email service that offers free accounts.

GnuPG implements the OpenPGP standard and provides tools to encrypt and sign data and communications, with key management and directory access.

Peergos provides end-to-end encrypted storage, file sharing, and sync while also protecting file metadata and sharing relationships, per its site.

Tuta offers encrypted email, calendar, and contacts, with apps that the site says protect personal data using end-to-end encryption.

NordLocker provides encrypted cloud storage and a private file vault for securing, backing up, accessing, and sharing files across devices.

Internxt offers encrypted cloud storage using zero-knowledge technology, with additional products listed for VPN, antivirus, cleaner, and mail.

Tuta is an email service whose repository says it encrypts emails, contacts, and calendar entries across users’ devices.

This OpenPGP page lists email applications that support the standard directly or through additional software, across several desktop platforms.

Burn My Note creates encrypted notes that self-destruct after reading, with optional password protection and configurable expiration times.

Share encrypted notes and files that self-destruct with s.cr, without creating an account.

Hemmelig lets users share encrypted messages that automatically self-destruct after being read, according to its site description.

Search the MIT PGP public key server for keys by email address or name, then retrieve the matching public key.

Share one-time secrets through a browser-based platform that encrypts them with AES before sharing.

OneTimeSecret creates self-destructing links for sharing passwords and other sensitive information; the page also describes self-hosting.

Yopass encrypts secrets in the browser and creates one-time links that expire, providing a way to share sensitive information without accounts.

Encrypt email and files on Windows with Gpg4win, a software package based on GnuPG.

Portable Secret creates self-contained HTML files that decrypt messages or files locally in a browser using a password.

SafeNote encrypts notes or files and shares them through links that expire after they are read, with selectable message lifetimes.

BURN.link is presented as a service for sending secure messages that disappear after they are read.

Koofr provides web, desktop, and mobile file access, supports WebDAV and Rclone, and can connect Dropbox, Google Drive, and OneDrive accounts.

The Hemmelig.app project shares encrypted secrets to help keep sensitive information out of chat logs, email, and similar channels.

Mailvelope adds PGP end-to-end encryption to Gmail and other webmail services, with options for private users and organizations.

Minisign signs files and verifies signatures through a simple command-line tool.

Search, upload, and manage OpenPGP keys through keys.openpgp.org, a key service powered by Sequoia-PGP.