http://stackoverflow.com/questions/652916/converting-a-java-keystore-into-pem-format
Keytool to OpenSSL Conversion tips
http://conshell.net/wiki/index.php/Keytool_to_OpenSSL_Conversion_tips
OpenSSLでpfx形式、PKCS#12形式をPEM形式に変換する
http://system-admin.seesaa.net/article/94984370.html
KeyStore Explorer
http://www.lazgosoftware.com/kse/
未検証