Fatbrain is the place for professionals seeking information resources: books, courses, ...
Big companies provides their customers with access to resources that related with their specific areas of interest. FatBrain has more than 2.500 computer, video and web-based classes.
SmartPlanet offers 700+ of free and paid courses not only for programmers.

ISO Family Network offers 300 online courses of CGI/Perl, C++ and many others.

MicroStrategy offers free online courses and plans to open free online university .

SmartForce (former CBT) has a lot of paid online training courses! They have big experience and all their courses are developed with the same structure.

DigitalThink offers 83 online expert-written training courses.

LearnKey - near 100 courses on CD-ROM.

Harcourt offers a lot of professional education courses and certifications.

GoCertify offers some courses and certifications. They are partners of Novell, Cisco, Oracle, Microsoft.

Sylvan Prometrics offers 70 online certification tests in many IT areas.

SmartPlanet ZDNet offers free and paid online courses.

Lists of online certifications and courses you'll find in About.com Guide to Computer Certification and CertifiedComputerPro.com.

For many companies, achieving and sustaining competitive advantage in the 21st century will be dependent upon the success of their IT initiatives. Such success, in turn, will depend upon their ability to identify, hire, train and deploy employees and contractors with the right skills for the job.