This is a blog that appears to be dedicated to finding the best open source and freeware software. In this case, the listing is for popular free and/or open source Macintosh software.
Under popular it lists the following applications:
* Apple Boot Camp
* AppleJack – a user friendly troubleshooting assistant for Mac OS X.
* Burn – an application to burn most common disks formats
* Butler – makes it easier for you to perform different potentially recurring tasks.
* Chicken of the VNC A fast, lightweight VNC client for Mac OS X.
* Carbon Copy Cloner – will clone one hard drive to another.
* ClamXav – a free virus checker for Mac OS X.
* Cyberduck FTP – an open source FTP and SFTP (SSH Secure File Transfer) browser
licensed under the GPL.
* Desktop Manager – a virtual desktop manager for the Mac OS X.
* FinderPop – A classic Mac utility, now a preference pane for OS X.
* iGetter – a full featured download manager and accelerator.
* ImageWell – a small, but powerful, image editing application.
* iWebMore – easily and quickly add features to sites created in iWeb.
* iWillQuit – A simple mean to save electricity.
* Linotype FontExplorer X – a new standard for font management software.
* MainMenu – runs all the various tools and scripts to keep your Mac
running smoothly.
* Max – for creating high-quality audio files in various formats.
* MenuMeters – a set of CPU, memory, disk, and network monitoring tools.
* Namely – one of the fastest way to open applications.
* OnyX – runs misc tasks of system maintenance, to configure some hidden
parameters of the Finder, Dock, Dashboard, Exposé, Safari, Login window and
of some of Apple’s own applications, to delete caches, to remove a certain number
of files and folders that may become cumbersome, to see the detailed info of your
configuration, to preview various logs and CrashReporter-reports, to check the
Preferences files and more.
* Perian – a free, open source QuickTime component that adds native support for
many popular video formats.
* THPasteboard – a multiple pasteboard program for OS X.
* Quicksilver – an application launcher; a unified, extensible interface for working
with applications, contacts, music, and other data.
* Service Scrubber – Restructures the services menu, changes service keyboard
shortcuts or disable services.
* SharePoints – an application or a preference pane that makes it easy to add
and delete share points like in the old Finder.
* Sizzling Keys – allows control of iTunes with keyboard shortcuts from any
application.
* Skim – a PDF reader and note-taker for OS X.
* SlimBatteryMonitor – cuts he menubar space by half and is easily customizable.
* SMARTReporter – an application that can warn you of some hard disk drive
failures before they actually happen!
* smcFanControl – lets the user set the minimum speed of the build in fans.
* Springy (StuffIt replacement) – archiving utility that will make your everyday
archiving activities much more pleasurable.
* SuperDuper! – makes recovery painless, because it makes creating a fully bootable
backup.
* TextWrangler2 – a general purpose text editor, and Unix and server administrator’s
tool.
* TinkerTool – gives access to additional preference settings Apple has built into
Mac OS X.
* Transmission – a lightweight, yet powerful BitTorrent client.
* Unarchiver – a replacement for “BOMArchiveHelper.app”, the built-in archive
unpacker program in Mac OS X.
* Vienna – a freeware, open source RSS/Atom newsreader for the Mac OS X.
* VLC Media Player – a highly portable multimedia player for various audio and
video formats.
* WhatRoute – a free scriptable application based on the UNIX traceroute command.
* Yahoo Messenger – The ONLY Mac messenger that can consistently do video chats with people who aren’t using Macs.
There is much more detail, and there are links for downloading each file.
See it here.






