KeyStore Explorer - KeyStore Explorer is an open source GUI replacement for the Java command-line utilities keytool and jarsigner. KeyStore Explorer presents their functionality, and more, via an intuitive graphical user interface.
OpenXPKI - OpenXPKI is a software stack that provides all necessary components to manage keys and certificates...
Dogtag PKI - The Dogtag Certificate System is an enterprise-class open source Certificate Authority (CA).
Marlin - Marlin is a new GTK3-based file manager for Linux, pretty slick and fast.
Vault by HashiCorp - Tool for managing secrets
OptiSigns - OptiSigns Digital Signage is a platform that helps users to make any screen a digital sign for information or advertisement.