Components:

• Matt Gemmel’s code – MAAttachedWindow, MGTemplateEngine, SSPrefsController, RoundedBox
• TDParseKit – MIT, parser kit
• crash reporter – Apache license
• plcrashreporter – MIT
• survey of crash reporters
• JSTalk – JavaScript-based AppleScript replacement
• BGHudAppKit – HUD-like windows and controls, New BSD, drawing-only (no images)
• MoKit – Cocoa extensions, APL
• RBSplitView – MIT, improved split view
• Aquatic – licensing/registration scheme
• DrawKit – tree folder, drawkit, BSD
• http://yllan.org/code/frameworks.php – another list of useful code
• SM2dGraphView – graph/chart component, BSD-like?
• HMBlkAppKit – BSD, transparent, black panels
• NoodleKit – misc Cocoa helpers
• AqToolkit – more misc Cocoa helpers
• MbCoverFlowView – Cover Flow re-implementation
• FolderSweep – faster way to get directory listing
• iLife 08-like source list, New BSD, ui widget
• SDEGUtis – misc Cocoa things (SDListView – improved NSOutlineView, SDKeyChain, Macdown, CocoaREST)

Networking:

• Asi Http Request – web requests + s3 support
• Cocoa HTTP Server
• Cocoa Async Socket
• Http upload sample

Full applications:

• Ingredients – os x developer documentation viewer
• Understudy – GPL, front row plugin that adds support for Hulu, Netflix, YouTube.
• HTTP Client – BSD, UI for sending HTTP requests and inspecting HTTP requests/responses
• MacShark, network sniffer, nmap, dig, whois etc., New BSD
• Eavesdrop, GPLv2, network sniffer
• hexfiend, BSD, hex editor
• AppHider – moves apps from doc to menubar
• RoaringDiff – graphical diff
• ReaderNotifier – shows Google Reader status in menu bar
• Quick Search Box – from Google
• MenuMeters – GPL, shows stuff in menu bar
• Cocoalicious – BSD, del.icio.us client
• VitaminSE – picture viewer
• SimpleCominc – MIT, comic viewer
• Murky – BSD, Mercurial GUI
• Fugu – fugu, BSD, sftp gui client
• The-Gist – twitter client, BSD
• TopDraw – Apache 2.0, JavaScript-based drawing system (like processing but without animation)
• Nally – telnet/ssh/bbs. Examples of how to use NSTextView
• Fluidium – has TDListView
• CocoaCeDict – shows how to implement variable-height NSTableView (from http://www.eng.uwaterloo.ca/~ejones/)
• FourSquareX – has an example of a nice table outline cell
• Bean text editor – Bean text editor. Has an example of a high-lighted bold/italic/underline control.
• Notational Velocity – a note taker

Text system (NSTextView, NSLayoutManager, NSTextStorage, NSTextContainer):

• http://www.zathras.de/angelweb/blog-cocoa-text-system-everywhere.htm
• http://michael-mccracken.net/2009/09/textshapeview/ – implements overview of the document (mipmap)

NSMenuExtra, NSStatusItem:

• http://www.cocoadevcentral.com/articles/000078.php
• http://files.semaja2.net/NSStatusItem%20-%20ObjC.html – creating a NSStatusItem
• http://www.cocoadev.com/index.pl?NSStatusItem

Misc code:

• desktop clock – shows how to draw transparent clock on the desktop
• http://www.katoemba.net/makesnosenseatall/2008/02/05/multiline-cells-in-nstableview/ – Multi-line cells in NSTableView
• Safari-like button bar in IB
• http://www.katoemba.net/makesnosenseatall/2008/01/09/nsview-with-gradient-background/ – NSView with gradient background
• Flurry – custom NSTableHeaderCell
• http://www.google.com/codesearch/p?hl=en#8W3WpxYEOks/trunk/cocoalicious/UI/SFHFTableHeaderCell.m&q=NSTableHeaderCell%20lang:objectivec&d=3 – custom NSTableHeaderCell
• helper for Key Chain access
• rfc2822 date parsing
• iso8601 date parsing
• wax – lua objective-c/cocoa bridge for iPhone apps

Misc tutorial pointers:

• Cocoa Dev Center