Software Verification
Software Verification Limited. Software tools for C++, Java, Python, Ruby, Lua, JavaScript, PHP, Perl, Visual Basic, Delphi, Fortran 95.
http://www.softwareverify.com/

Semantic Designs
Provides automated software engineering tools in the areas of legacy migration, software measurement and analysis, custom compilers and program transformation tools.
http://www.semanticdesigns.com/

Spud City Software Co.
Information and free trial versions of Desktop Dozen, TraxTime, and Zip Code Genie, three popular productivity software tools.
http://www.spudcity.com/

TechniSolve Software
refrigeration and airconditioning software
http://www.coolit.co.za

ISD Software Design
Professional software tools for teachers and schools, including gradebook software, lesson management software and school administration software. [Windows]
http://www.isdsoftwaredesign.com

Pragmatic Software Co.
Software Planner is an award winning application lifecycle management (ALM) tool that helps Information Technology (IT) departments manage all components of software development including managing customer requirements, project deliverables, test cases, defects, and support tickets.
http://www.pragmaticsw.com/Pragmatic/SoftwarePlanner.htm

Modem Tools
Modem software for fax and voice modems
http://www.modemtools.com

Steve Ekblad's Free Audio Software and Online Audio Tools
Steve Ekblad's Free Audio Software Page and On-Line Enclosure Design.
http://www.audiogrid.com/audio/

Software Tools for Process Integration
List of software tools on Process Integration, and user's experiences with those tools are presented.
http://www.technology.novem.nl/en/processtools/

Fermitools
The Fermilab Software Tools Program (Fermitools) aims to provide useful tools to the community. A wide range of tools are available, and all are free.
http://fermitools.fnal.gov/