ECC is the Enterprise Central component installed in over 95% of SAP implemented base. This is the core module that comes with FI CO, HCM, MM, SD, PP, PLM, QM, PS, DS, Logistics and a ton more components. This is the Latest version which has the Enhance Package 6 (EHP6} along with the full IDES package.
This is newest feature of SAP: ECC 6.0 EHP6 IDES system. System is based on Netweaver 7.31.includes all standard modules such as FI, CO, MM, SD, HR, PM, PP, QM, WM, workflow. Web dynpro working, Adobe Lifecycle working