Kleopatra is a certificate manager and a universal crypto GUI.
- File Encryption Software
- Free • Open Source
- Linux
- KDE Plasma
- Flathub
- GnuPG

Kleopatra is a certificate manager and a universal crypto GUI.

USB security device for encryption, digital signing, and secure login, featuring secret key storage, user PIN, tamper-proof smart card, and open source design.

Automates HTTPS setup using Let's Encrypt certificates and supports multiple servers. Open source tool by EFF, prioritizing internet security.

X Certificate and Key management is an interface for managing asymetric keys like RSA or DSA. It is intended as a small CA for creation and signing certificates. It uses the OpenSSL library for the cryptographic operations.

KeyStore Explorer is an open source, intuitive GUI replacement for the Java command-line utilities keytool and jarsigner. KeyStore Explorer supports creating, managing and examining keystores, keys, certificates, certificate requests, certificate revocation lists and more.

Welcome to a place, where you can learn cyber-security using more than 100+ tutorials & certification training, created by cyber security experts.

Courses Plus is an online platform for creating and selling digital courses and products. It enables users to establish an eLearning business and sell their knowledge through an online store. The platform supports digital product creation and subscriptions for recurring revenue.

FREE SSL certificates issued instantly online with Free SSL Certificate Wizard. Downloadable client for all platforms and Docker image available. Zero system requirements, zero technical knowledge, zero cost.

Allows to certify a document ( of any format ? ), it gives a fingerprint relative to the date of the certification and it is stored in an online "Bitcoin blockchain". It can also verify the integrity of a document.
strongSwan is an Open Source IPsec-based VPN solution for Linux and other UNIX based operating systems implementing both the IKEv1 and IKEv2 key exchange protocols.
The Dogtag Certificate System is an enterprise-class open source Certificate Authority (CA). It supports all aspects of certificate lifecycle management, including key archival, OCSP and smartcard management, and much more.
Handshake is a decentralized, permissionless naming protocol compatible with DNS where every peer is validating and in charge of managing the root zone with the goal of creating an alternative to existing Certificate Authorities.
CancanIT is the center of certification for web developers and programmers. It provides high-quality solution for starter developers to prove their professional skills taking online certification exams.

CAcert.org is a community-driven Certificate Authority that issues certificates to the public at large for free.
Electronic Signature Service for Your Business. Sign and send documents for signing online.
TinyCA is a simple graphical userinterface written in Perl/Gtk to manage a small CA (Certification Authority). TinyCA works as a frontend for openssl
Digital Credential Management Software with powerful API. Everything you need to issue high-quality certificates. Powerful features such as the certificate builder, automatic emails, and comprehensive API.

Digicert’s Certificate Inspector scans the user’s network detecting all certificates in use, their configuration and implementation, and then displays the results in an intuitive and interactive dashboard.

gnoMint is an X.509 Certification Authority management tool ; an easy CA managing tool for graphical and command line environments. //
Enterprise Java Beans Certificate Authority, or EJBCA, is a free software public key infrastructure (PKI) certificate authority software package.

OpenXPKI is a software stack that provides all necessary components to manage keys and certificates primarily based on the X509v3 cryptography standard.

RCDevs' OpenOTP Security Suite is an all-in-one enterprise solution for multi-factor authentication (MFA), identity and access management (IAM), single sign-on (SSO), public key infrastructure (PKI), network access control (NAC), and mobile badging.

Design & Deliver Verifiable Certificates.

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