Tools

Apple Development Tools
Tools available for download include MPW, MRJ and SDKs. Links to AppleScript and HyperCard sites at Apple.
http://developer.apple.com/tools/

BBEdit
a high-performance text and HTML editor for the Macintosh. Includes many features which have been specifically developed in response to the needs of HTML authors and software developers.
http://web.barebones.com/products/bbedit/bbedit.html

CodeBuilder
Cross-platform development and porting tool for MacOS. An Economical choice for users who want the power of a complete UNIX developmental platform on their Macintosh. From Tenon.
http://www.tenon.com/products/codebuilder/

Excel Software
Produces object-oriented programming tools for Macintosh programmers, including MacA&D, MacTranslator, and QuickCRC.
http://www.excelsoftware.com

General Edit
a file utility designed to help programmers and other software professionals view or edit data files with complex formats
http://www.quadrivio.com/

Guide to Think Pascal 4.5d4
Introduction to the free Symantec Pascal compiler, written by Ingemar Ragnemalm, Mac shareware author.
http://www.lysator.liu.se/~ingemar/tp45d4/think.html

Hsoi's Shop
Specializing in Mac OS software development and development tools. PowerPlant contributed classes, frameworks, WASTE Object Handlers, and other resources for the Mac software developer.
http://www.hsoi.com/hsoishop/

Info-Mac HyperArchive's Development Directory
Downloads of many useful programming tools and source code.
http://hyperarchive.lcs.mit.edu/HyperArchive/Abstracts/dev/HyperArchive.html

JobOrder
project management software helps you efficiently manage projects... offers productive job management functions without the cost and complexity of high-end vertical market systems.
http://www.joborder.com/

Kagi
Payment processing service for shareware authors.
http://www.kagi.com/

Kickstand Software
Kickstand Software produces Mac software for developers and users.
http://www.kickstandsoft.com

Loafer
an extension of "copy-paste" technique in source code writing. It will not write source code instead of you but it will save you from part of routine work.
http://www.elegantsoft.com/Products/Loafer/HomePage.html

MindVision
software delivery specialists: installers, installer builders, updaters, network distribution, the works.
http://www.mindvision.com/

MPW ToolZone
industrial strength development tools for free? C, C++, assembler, 68K, PowerPC, shell scripting, debuggers... This simply cannot be!
http://developer.apple.com/tools/mpw-tools/

Object Logo
Digitool's implementation of Logo for the Mac.
http://www.digitool.com/

ObjectPlant
Shareware program for Object-Oriented Analysis and Design. The notation used is based on the Object Modeling Technique, OMT but also supports a subset of the Unified Modeling Language (UML).
http://www.arctaedius.com/ObjectPlant/

SmalltalkAgents: It's Finally Here
An article in Mac Tech describing the features of this development and debugging software.
http://www.mactech.com/articles/mactech/Vol.10/10.04/SmalltalkAgents/