Apache Directory Studio

Apache Directory Studio (formerly known as LDAP Studio) is a complete LDAP tooling platform intended to be used with any LDAP server however it is particularly designed for use with the Apache Directory Server.
Developed as a sub-project of the Directory Top Level Project, Apache Directory Studio is an Eclipse RCP application that takes full advantage of the benefits inherent in the Eclipse platform.

Composed of several Eclipse (OSGi) plugins, Apache Directory Studio can be easily upgraded with additional plugins.
Apache Directory Studio plugins can even run within a full installation of Eclipse itself.
The "Download Now" links yields the 64-bit version. The 32-bit version is available here.