Here’s a (maybe incomplete) list of my Mac OS X Development system setup. Mainly for me to remember, but maybe a help for you too:

Main Development Setup
Snow Leopard Lion
xCode (or latest iPhone SDK)
Mac Ports, now I prefer Homebrew
Ruby: rvm + rubygems + rails etc.
Database: Mysql 5.1 + Sequel Pro
OpenVPN: Tunnelblick, or Cisco VPN client + Shimo VPN Menubar Addon
Terminal Console Extension: SIMBL + Visor iTerm 2
TextMate + Missing Drawer + Get Bundles + Rails + AckMate …
jEdit + FTP + …
Git + GitX (Experimental)
FTP & Co: Cyberduck
Hudson status: CCMenu
Share Files: Dropbox
Google Chrome
Safari
Firefox + Firebug

Extended Development
Arduino
Processing
Fritzing
Eclipse

Nice to have:
System Notification: Growl + Growl Mail
Read RSS: NetNewsWire Now using RSS within Apple Mail
IRC Client: Colloquy and hide join messages Adium
Skype and Tweetie original Twitter client
Control iTunes: SizzlingKeys Bowtie
Spotify and Spotify Menubar and more goddies
Last.fm: iScrobbler
All Codecs: Perian
Dasboard widgets: IP + App Update
Copy&Paste History: Flycut
Track Work: MacTimeLog
Word replacement: iWork
Keep your Notes: Journler
Extend Finder: TotalFinder
Mail Archiver and other MailPlugins

Install hints
mac ports
sudo port selfupdate
sudo port install git-core +svn +bash_completion
sudo port install ImageMagick +no_x11
sudo port install wget

ruby gems

http://stackoverflow.com/questions/991708/rails-mysql-and-snow-leopard

sudo gem self update
sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config
sudo gem install rails
sudo gem install passenger
sudo gem install piston

Safari open always in tabs:

http://www.456bereastreet.com/archive/200812/make_safari_open_targeted_links_in_new_tabs_instead_of_new_windows/

defaults write com.apple.Safari TargetedClicksCreateTabs -bool true

Safari enable Development mode:
defaults write com.apple.Safari WebKitDeveloperExtras -bool true
defaults write com.apple.Safari IncludeDebugMenu 1

Safari Plugins:

http://alexstaubo.github.com/keywurl/

TextMate install bundle
cd ~/Desktop && svn co http://svn.textmate.org/trunk/Review/Bundles/GetBundles.tmbundle/

Well, that’s it! Stay tuned for updated…

For that, I needed Serial communication within ruby. Thanks to ruby-serialport first steps went quite well. I could write OR read from and to Arduino easily. But for some reasons, writing AND reading using the same instance didn’t work out.

I used a simple ‘send-input-back’ sketch on the Arduino side. So every byte I’m sending is returned back. I checked with the Arduino IDE Serialmonitor and a simple Processing script – everything worked alright. But using ruby it was different. Writing to serial port worked okay, but reading from it was just random. Sometimes I read the response, sometime I didn’t – really, really weird. Some headaches and a lot of time testing I finally found the solution: just open two instances of the serial port. One for sending, one for reading – and, surprise, surprise – it works perfect! Who would have guessed that!? Strange..

// To be completed
require 'serialport'
port_write = Serialport.new()
port_read = Serialport.new()

Ok, continuing hacking, more soon…

module Kernel
   private
   def this_method
     caller[0] =~ /`([^']*)'/ and $1
   end
end

for Ruby >= 1.9 you can uses this:

module Kernel
   private
   def this_method
     __method__
   end
end

[see Stack Over Flow as well]

Check this out, here some lists of good techniques to get started and to impove your Ruby and Rails code:

http://nettuts.com/articles/web-roundups/10-awesome-ruby-on-rails-techniques-to-get-you-started/

http://www.rubyinside.com/19-rails-tricks-most-rails-coders-dont-know-131.html

http://www.rubyinside.com/21-ruby-tricks-902.html

[Awsm picture taken from DesignShark]

Unfortunately it didn’t provide the possibility to delete or update an image once it’s assigned to an object. Well no problem, another fork of mine, some coding and now it possible. I basically reused to code of the as_file_column_bridge. Check it out here:
http://github.com/rngtng/as_paperclip_bridge/tree/master

Update: changes got merged into trunk, check it out:

http://github.com/mnaglik/as_paperclip_bridge/

I rubyfied the class, did some code cleanup, added (yet a very simple) way to get the original message, and gained some performance by paring message only on demand. A testcase was broken as well the Rakefile, both are fixed. See the update here:
http://github.com/rngtng/bounce-email/tree/master

Comatose (29. June 2007)
Comatose is a micro CMS designed for being embedded into existing Rails applications

http://railsbased.org/projects/8-Comatose.html

Geego
Geego is for developers and designers that want to provide fully updatable websites for their clients.

http://www.geegocms.com/

Mephisto (27. July 2006)
Complete Blog System, Mephisto is a publishing system that makes it super easy to setup a blog or website.

http://mephistoblog.com/

Typo
Complete Blog System, Similar to Mephisto

http://wiki.github.com/fdv/typo/

Radiant CMS
Radiant is a no-fluff, open source content management system designed for small teams.
Looks cool but no direkt RoR integration?

http://radiantcms.org/

Railfrog (3. July 2007)
Railfrog is a user-friendly, open-source website deployment and content management system built with Ruby on Rails.
dead project?!

http://railfrog.com/

Rubricks (31. July 2007)
Rubricks is a component based open source CMS powered by Ruby on Rails.

http://rubricks.org/

Seymore (04/02/2007)
Seymore is an open source content management system which integrates directly into pages.

http://www.slicedsoftware.com/software/seymore/

SimpleCMS, (29. December 2007),
small simple, inline edit. Simple CMS is a very easy to use and pretty advanced CMS plugin.

http://pullmonkey.com/2007/12/30/simple-cms-plugin-for-rails-demo

CMSPlugin
CMSplugin provides your Rails application with a “CMS framework”. That means authentication, authorization, roles, permissions, categories, tags, etc… but from a very flexible scope.

http://cmsplugin.rubyforge.org

open rcms (25.6.2007)

http://rcms.oopen.de/Home/

Roxanne
An in-place editor for your entire website. Roxanne is a simple Site-Management Tool to quickly manage your content. See first steps to get the idea behind Roxanne.

http://www.m42.ch/projects/roxanne/information.php

Substruct
The first and most robust Ruby on Rails open source e-commerce project.

http://code.google.com/p/substruct/

Goldberg (promising)

http://www.goldberg.240gl.org