IT certifications
(ISC)2
Adobe
Amazon
Cisco
Citrix
CIW
CompTIA
Crystal Reports
CWNP
Dell
EC-Council
ECDL
Google
IC3
ISACA
ISTQB
ITIL
LPI/Linux
Logical Operations
Microsoft
Oracle
SAP
SCP
VMware
Zend

Professionals certifications
BCEN
CTS
HRCI
IIBA
NRFSP
PMI