It's one thing to have an encyclopedia and quite another to have software that combines a couple of those. Such software usually gives you more options and better and easier search engine. Check out this software category, read reviews on these education applications, take a pick, and download instantly.
Mediapro Education Technology Private Limited
Armenian Dictionary Software Inc.
Recovery Toolbox, Inc.
Traductor-Gratis, Andres Carizza
Axfite Pty Ltd Australia
Purple Room Publishing