Alexandria: Composition-based product line methodology supports the flexible development based on product lines.
Another B Tools: Present a formal method for incremental development. Includes documentation, tools, examples, and a forum.
Cleanroom Software Development Methodology: Introduction, overview, and examples; by John W. Shipman.
Cleanroom Software Engineering: Information on this methodology aimed at zero software defects. Includes education, literature, experts and tools. By Data and Analysis Center for Software (DACS).
DSM Forum: Domain-Specific Modeling: Forum exists to spread the knowledge and know-how of Domain-Specific Modeling. Examples applying in industrial applications, events, publications, links.
Introduction to Thoughtful Programming and Forth Philosophy: By Michael Misamore; essay with text and references, on a flexible, proven, back-to-basics, minimalist philosophy that operates consistently from low to high abstraction levels; with ideas for future improvements. [Freely Distributable]
Metamodels: Information on metamodelling activity. Includes news, FAQ, glossary, and links.
Methodology (Software Engineering): Growing article, with links to many related topics. [Wikipedia]
Methodology.org: General information, lists of papers, books, fora, links.
Osellus Inc.: Offers consulting and the IRIS software(based on SPEM) to automate and simplify the software development process. Includes white papers and links.
PackageWare: Methodology and set of open-source patterns and strategies that allows teams of software developers to retain simplicity through the effective modularization of their code-bases.
Select Business Solutions: Provide modeling tools, component reuse, and service oriented architecture tools.
Sequoia: A practical guide, to this software development methodology, that helps the developer in every step of an IT project. Includes examples and links.