High Performance MySQL, 2nd Edition - O'Reilly
MONyog is a lightweight, agentless monitoring system that takes a different approach from the tools previously mentioned. It is designed to run on a desktop system, where it starts an HTTP listener on an unused port. You can point your browser at this port to see information on your MySQL servers, rendered by a combination of JavaScript and Flash. The underlying implementation uses a JavaScript engine, and all configuration is done via a JavaScript object model.
MONyog is actually both interactive and noninteractive, so you might want to examine its capabilities for both kinds of monitoring.

Sheeri Cabral - The Pythian Group
MONyog is the best out-of-the-box GUI monitoring tool for MySQL that
I have seen. It "just works." As promised, getting up and running
quickly is easy, and having a centralized location for monitoring is
very useful. The graphs are beautiful and the statistics that are
graphed are useful time-savers.
The biggest difference between MySQL's Enterprise Monitor and MONyog
is that MONyog is agentless. At Pythian, we have many clients with
differing security requirements. Requiring a daemon process to be
running is not something we currently do, and it might be a hard sell
for some clients. Even if every client was amenable to it, making sure
the daemon is up and running on each MySQL server is tedious. Note
that agentless operation works for every feature, including log
analysis as well as operating system statistics.

Karim Ahmed - Freelance Software Developer
As a developer, SQLyog Enterprise has been one of my essential tools for 7 years now and has never let me down. The Powertools are the icing on the cake and set it above all other DB administration tools I've used.

David Choi - PhpSNS.com
First of all, I have tried every MySQL Client that exists on the market
in different platforms (Windows, Linux, Mac) but SQLyog Enterprise is the best
MySQL Client in the world! Now I am using Linux desktop for PHP script
development and I am surprised that SQLyog also works flawlessly with
WINE.
The best thing about SQLyog Enterprise is the ability to access
remote servers via HTML protocol by uploading a SQLyog tunnel file via
FTP, which is indispensable for me when I need to install my PHP/MySQL
scripts so I don't have to request access info for client's hosting
control panels (which is very sensible) to be able to use phpMyAdmin all
the time.
The only bad thing about using SQLyog Enterprise is, you will forget about using
SQL commands because almost everything can be done via MySQL GUI!
