TinyCA is a Scripts software developed by sm-zone.net. After our trial and test, the software is proved to be official, secure and free. Here is the official description for TinyCA:

BS Editor: TinyCA is a simple graphical userinterface written in Perl/Gtk to manage a small CA (Certification Authority).
TinyCA works as a frontend for openssl

Features:

Currently TinyCA supports the following features:

* Unlimited CAs possible
* Support for creating and managing SubCAs
* Creation and Revocation of x509 - S/MIME certificates
* PKCS#10 Requests can be imported and signed
* RSA and DSA keys can be generated and used
* ServerCertificates
o Certificates can be exported as: PEM, DER, TXT and PKCS#12
o Certificates may be used with e.g. Apache, Postfix, OpenLDAP, Cyrus, FreeS/WAN, OpenVPN, OpenSWAN, FreeRADIUS
* ClientCertificates
o Certificates can be exported as: PEM, DER, TXT and PKCS#12
o Certificates may be used with e.g. Netscape, Konqueror, Opera, Internet Explorer, Outlook (ExPress) and FreeS/WAN
* Certificate Revocation List
o CRLs can be exported as: PEM, DER and TXT
* Language Support:
o English
o German
o Czech (Thanks to Robert Wolf )
o Swedish (Thanks to Daniel Nylander )
o Spanish (Thanks to Ramon Pons Vivanco )
o French (Thanks to Thibault Le Meur )