If you are looking for alternatives for some applications you are currently using in your Mac, the following list might come in handy too.

a list of useful yet free applications you can install for your Mac.

Productivity

Anxiety

Provides a streamlined, easily accessible interface to add and check off your tasks, while remaining poised to melt into the background at a moments notice.

Appointments

Keep record of customers, contact persons and important events related to them.

Camouflage

Hides all the icons and leaves nothing but the pure wallpaper

Evernote

Easily capture information in any environment using whatever device or platform you find most convenient, and makes this information accessible and searchable at any time, from anywhere.

EventSync

Allows you to sync your Facebook events with iCal.

HimmelBar

HimmelBar provides an icon in the menu bar to quickly access your installed applications by scanning standard locations such as local, user, network and developer applications.

MindNode

Simple-to-use mindmapping applications for the Macintosh that help to visually collect, classify and structure ideas as well as organize, study and solve problems.

NameChanger

Designed for the sole purpose of renaming a list of files.

Punakea

Allows you to tag your files and bookmarks, freeing you of the strict hierarchy of the Finder’s folder structure.

Quicksilver

A unified, extensible interface for working with applications, contacts, music, and other data.

SketchBox

Sticky Notes Manager for your Mac Desktop.

Slife

Time and activity analytics application that automatically keeps track of where you spend your time on your computer.

SyncMate

Help you keep all your documents, text messages, contacts, calendar entries and events and other stuff well organized.

Think

Helps you to concentrate on your current task and activity.

Todos

Todos shows you all your applications in a complete dock.

Tools and Utilities

AppFresh

Update: This app is no longer available for free.

Helps you to keep all applications, widgets, preference panes and application plugins installed on your Mac up to date.

Burn

Mac’s application to burn discs, with a lot of advanced options.

Garagebuy

Help you find and purchase items on eBay.

Set Icon

Small application that lets you quickly and easily set a custom icon for one your drives either from an ICNS file or any old image file that Mac OS supports.

TextWrangler

Powerful general purpose text editor, and Unix and server administrator’s tool.

NeoOffice

Full-featured set of office applications (including word processing, spreadsheet, presentation, drawing, and database programs) for Mac OS X.

Emacs

An Editor for Text, HTML, LaTeX, C++, Java, Python, Perl, Ruby, PHP, and more…

Readers

Adobe Reader

Read PDF files with this Adobe Acrobat reader.

NewsFire

A great RSS reader for Mac whom recently made free.

ThunderBird

Powerful email application from Mozilla.

System

AppCleaner

AppCleaner is a small application which allows you to thoroughly uninstall unwanted apps.

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. Hold down the Command key while clicking to show the menu.

Deeper

Allows you to enable and disable the hidden functions of Finder, Dock, Dashboard, Exposé, Safari, Login window and many Apple’s applications.

EverSave

Allows you to save all of your documents in a specific time interval or by changing the frontmost application.

Growl

Growl lets Mac OS X applications unintrusively tell you when things happen.

iStat pro

Highly configurable widget that lets you monitor every aspect of your Mac, including CPU, memory, disks, network, battery, temperatures, fans, load & uptime and processes.

Loginox

Easily customize your Mac’s login screen.

MacLoc

After clicking on MacLoc, it will appear that you’ve logged out, however upon entering your username and password, all open documents and applications will be right where you left them.

Mactracker

Provides detailed information on every Apple Macintosh computer ever made, including items such as processor speed, memory, optical drives, graphic cards, supported Mac OS versions, and expansion options.

OnyX

Allows you to verify the Startup Disk and the structure of its System files, run miscellaneous tasks of system maintenance, configure some hidden parameters of the Finder, Dock, Dashboard, Exposé, Safari, Login window.