Utilities

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Get flash to fully experience Pearltrees
In 2010 I bought a used 2009 MBP running Leopard, and noticed the first day that the bottom was very hot. http://www.macupdate.com/app/mac/23049/smcfancontrol

Download smcFanControl for Mac - Control Intel Mac fans to make them run cooler. MacUpdate.com

TinkerTool: Details

Both applications share the same user interface and internal technology. http://www.bresink.com/osx/0TinkerTool/details.html
http://www.macupdate.com/app/mac/5721/tinkertool Customize many aspects of OS X. Free

TinkerTool

Cloud/Storage

Maintenance

Skitch opens up a small app that shows the screenshot and allows you to manipulate it in a variety of ways: resize, rotate, annotate, etc.

Skitch

http://skitch.com/
http://www.alfredapp.com/ “ I am really loving

Alfred

It works out of the box. When you start up a Growl-enabled application, it will just work. There's no complicated setup; just install Growl once and your apps can start displaying notifications right away.

Growl

http://growl.info/

Cyberduck

http://cyberduck.ch/ Edit any file with your preferred editor.
http://fluidapp.com/

Fluid

Turn Your Favorite Web Apps into Real Mac Apps.

The Unarchiver

Do you want to browse the contents of archives, rather than just extracting them? http://wakaba.c3.cx/s/apps/unarchiver.html

Caffeine

http://lightheadsw.com/caffeine/ Caffeine is a tiny program that puts an icon in the right side of your menu bar. Click it to prevent your Mac from automatically going to sleep, dimming the screen or starting screen savers. Click it again to go back.