jks - Java KeyStore (Oracle's KeyStore format);

pkcs12 - Public-Key Cryptography Standards #12 KeyStore (RSA's Personal Information Exchange Syntax Standard);

jceks - Java Cryptography Extension KeyStore (More secure version of JKS);

bks - Bouncy Castle KeyStore (Bouncy Castle's version of JKS);

bks-v1 - Legacy version of Bouncy Castle KeyStore - this has been added for people needing to create and manage key stores compatible with earlier versions of Bouncy Castle (less than 1.49);

uber - Bouncy Castle UBER KeyStore (More secure version of BKS);

Windows Root CA KeyStore;

Windows User KeyStore.