MICG  Socks is the best Mac OS X utility I have ever, ever used.

The options will be very clear for anyone coming from Mac OS 10.3.9 Panther, using the "sudo periodic" command in Terminal and other Mac OS X hacks, via the command line.

There's so many options to use to make Mac OS X customizable too.

It's been fun, helpful for correcting problems, and the best of the best utilities I could ever recommend to users of Mac OS X who want to maintain, customize, trouble-shoot, and keep their Mac OS X volume running trouble-free and fast. I tinker, so it's a necessity. It's nice to stay out of the command line, and not to have to re-do things when I can just launch Socks and get the job done.

Highly recommended!  
(Version 1.1.2)

DAVIDUSMUSICUS  Socks has been very useful to me. I really like the scheduling abilities and that the whole program is very customizable. The developer has been very kind and responsive too. I'm looking forward to further versions of this great app!  
(Version 1.1.1)

PEAAT  I have used System Optimizer X since version 2.0, It has been excellent in keeping my system running well, on many occasions when my mac was playing up, I have run the program and all has been sweet again.

My response from the developer has been positive in comments I have addressed to him and very helpful feedback.

Socks so far it has given me the same overall complete maintenance service as System Optimizer X, with a far better and detailed user interface. This is a program I hope will see me into the soon to be made upgrade to Leopard.  
(Version 1.0.2)

IRCHAMANDY  I would caution anyone considering buying this software because when a problem arises with it, the developer stops responding to support requests. After I ran the new version of SOCKS, it wiped out my Mac's ability to use keychains properly. Requests to the developer on how to fix the problem created by SOCKS have been ignored. It still isn't working properly and I have no idea how to fix it.  
(Version 1.0.2)

JOACHIMR  I have been using the free Onyx so far but socks as convinced me to pay the reasonable shareware fee. Yes, it does the same things - but it also adds a couple of things I really thought was worth the $: a very clear interface, that gives you enough control when you want it (for example the Spotlight control is far better implemented), but also gives you enough "just do it for me" options for the normal use (for example the regular automatic maintenance options). I am sure a number of people will argue that you can get most of these features for free or one particular feature in a better implementation, but Socks really makes it easy for me to maintain my computer and keeps it running smoothly in a very Mac-like fashion. The programmer assures me that it will also support Mac OS 10.5 (Leopard).  
(Version 1.0)

ASHNAZG  I've been using Socks 1.0 for awhile now. I must say, I've been extremely happy with it. It's never crashed when being used... it seems like a very solid build. I really enjoy the Mac OS interface tweaks that can be done to customize the OS but I've also found the maintenance features to be extremely useful. When my Spotlight searches stopped working Socks was able to fix it. It also allowed me to delete a hung application using the Forced Empty Trash option – very useful. I feel better about my system after running Socks when I've had to do a hard restart... I use the "Heavy Cleaning" option and it just seems to make things work better after the system caches are cleaned out and renewed. Being able to create a queue of tasks and then walk away from my computer while they run is very useful. Being able to have tasks automatically run at specified times is also pretty cool... along with being able to have a certain maintenance queue run after every hard restart. Plus, Socks was able to squeeze some extra speed out of my internet connection, how it does this I have no idea... but it optimizes the internet settings in Mac OS to make things run better... Awesome! It's definitely worth the low price... I've been very happy with it!  
(Version 1.0)

GRYPHONENT  AArrghhh.... this is the awful System Optimizer in a new dress. I just thought I remembered the name MKD Software. In fact, I’ve registered System Optimizer back in the old days... one of the biggest mistakes in terms of shareware I’ve ever made. Was never supported and never worked as advertised. Now, here comes Socks. The same app, almost, in a new dress. No cross-update offered for existing users. Not that I’d be tempted.  
(Version 1.0)