CA management - tinyca

TinyCA is a program with a simple graphical user interface that makes managing a small CA (Certification Authority) easy.  TinyCA works as a frontend for openssl and can deal with several independent CAs.
With TinyCA you can create and manage x509 and S/MIME server and client certificates.  You can choose between RSA and DSA keys, as well as between different digest algorithms.
The certificates can be exported as PEM, DER, TXT and PKCS#12 or as a convenient archive containing both key and certificate.  Certificates can be revoked by adding them to a certificate revocation list.

Free accounting system - Features | GnuCash

Many many icons - NounProject

NounProject

VM migrate with vSphere client

ref:http://blog.infinity.idv.tw/

Online Diagram Software

http://www.gliffy.com/