quintuple-agent serves as a cache for secrets, so that you don't have to enter them over and over again. You enter a secret once, and quintuple-agent stores it for a configurable timespan. Programs needing the secret can query the agent for it instead of bothering you.
Included are wrappers for PGP 2 and GnuPG.
Don't get me wrong, it's not a "password safe", it's a cache, not a facilty for permanent storage (which, wrt. passwords and -phrases, should reside only inside your skull anyway).
More information on this package can be found on the Debian web site.
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