OpenArch
OpenArch is a free website for genealogy in the Netherlands and Belgium, developed by Bob Coret. It consists primarily of civil registration, church records and population registers, though many other record types are also included. It's main rival is WieWasWie.
Links with FamilySearch
OpenArch has a partnership with FamilySearch that means some of their records have been made available on FamilySearch under the following historical record collections:
It is important to note that only a small fraction of OpenArch's records are included in these collections and that they may not be updated often. For best results search directly on OpenArch's website.