AMuleCMD

Basically, aMuleCMD is a command line interface to access aMule or aMuled locally or remote. To run AMuleCMD simply type the command name at a command prompt. Note it's all lower case.

$>amulecmd

(This is based on Linux. You may need to go to the actual directory on other OS's if it's not in the path.)

According to the amulecmd help you can perform the following commands:

Quit
Help
Stats
Show DL
Resume n
Pause n
ServerStatus
Connect
SetUpBwLimit n
SetDownBwLimit n
Disconnect

You can use this command to perform scheduled jobs with aMule(d), too. See FAQ_amulecmd for more details.
If you prefer something more graphical use AMuleGUI (or aMule of course ;-).

NOTE: You must have External Connections enabled in order to be able to connect to aMule(d).

I needed to set "use TCP ports instead of Unix local sockets" to be on, in Preferences -> Remote Connection -> External Connection Parameters.