Ultimate Certificate Manager, or UCM, runs your own certificate authority from a web interface, so issuing, renewing, and revoking certificates stops being a pile of OpenSSL commands. Create root and intermediate CAs, arrange them in a hierarchy, and manage every certificate through its life: issue, sign, renew in place, revoke with a reason, and export as PEM, DER, PKCS#12, or JKS. Devices and servers enroll themselves through ACME, SCEP, and EST endpoints, while OCSP answers status checks in real time and CRL distribution points publish revocations on schedule. Network discovery scans your address space and reports the certificates it finds, so expiring or unknown certificates surface before they cause an outage. Templates define server, client, code-signing, email, and smartcard profiles, with key types from RSA and elliptic curves to post-quantum ML-DSA, and issuance policies can route sensitive requests through an approval queue. Signing keys can live in an HSM so private material never leaves the hardware, and every key at rest can be encrypted under a master key. Operators sign in with passwords, TOTP, WebAuthn, mTLS, LDAP, OAuth2, or SAML, and role-based permissions decide who may issue, approve, or merely audit. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.