Vendor Neutral IT Certifications

Basic Computer Literacy Certification
Certiport = sponsors the Microsoft Office Specialist and IC3 certification (Internet and Computing Core).
CompTIA (Computing Technology Industry Association) = offers 12 professional IT Certifications, validating foundation-level IT knowledge and skills.
eCertifications
European Computer Driving License-Foundation = sponsors the European Computer Driving License (also called International Computer Driving License) (ICDL)
ExpertRating
INFINIDOX = sponsors 12 professional information security certifications.
International Information and Communication Technology Council Certification Program
ISC2 = sponsors the CISSP, SSCP and other security certifications
Linux Professional Institute
Majinate = sponsors the Accredited Symbian Developer scheme for Symbian OS
NACSE (National Association of Communication Systems Engineers) sponsors 36 Vendor Neutral, knowledge specific, Certifications covering the 5 major IT Disciplines which are: Data Networking, Telecomm, Web Design & Development, Programming & Business Skills for IT Professionals.
Planet3 Wireless = sponsors the Certified Wireless Network Administrator (CWNA) certification
Prosoft Learning Corporation = offers CIW, CCNT, CTP, AssessPrep certification tracks. Prosoft Learning
SAGE (organization) = sponsors the cSAGE program
SANS Institute = operates the Global Information Assurance Certification program
Storage Networking Industry Association (SNIA) = sponsors the SNIA Certification Program
The BSD Certification Group Inc. = a non-profit organization committed to creating and maintaining a global certification standard for system administration on BSD based operating systems.
The Open Group = sponsors TOGAF certification and the IT Architect Certification (ITAC) and IT Specialist Certification (ITSC) skills and experience based IT certifications.
XML Certification Program - XML Master

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APICS = establishes operations management standards and sponsors certification for Logistics
The American Institute of Certified Public Accountants = sponsors the Certified Information Technology Professional program.
The BCS = sponsors the Chartered IT Professional (CITP) programme.
The BDPA IT Institute = sponsors the BDPA IT Associate (BITA), the BDPA IT Professional (BITP), and the BDPA IT Master (BITM) certifications
The Canadian Information Processing Society = sponsors the Information Systems Professional certification in Canada.
The IEEE Computer Society = sponsors the Certified Software Development Professional as well as membership designations, "Senior" and "Fellow" which reflect experience and peer review qualification.
The IET = sponsors the Chartered Engineer and Incorporated Engineer, which can be ratified into the European Engineer
The Institute for Certification of Computing Professionals sponsors the Certified Computing Professional (CCP) and Associate Computing Professional (ACP) certifications