All the necessary ___ were delivered this morning.

The correct choice is "equipment" because in English, "equipment" is a non-countable noun. Non-countable nouns refer to items that cannot be counted individually and do not have a plural form. Therefore, when referring to "necessary equipment," it is appropriate to use the singular form "equipment" regardless of the quantity being referred to.

The other options do not comply with standard English usage. "Equiptments" and "equipments" attempt to pluralize "equipment," which is incorrect, as "equipment" encompasses all units collectively without requiring a plural form. "Equippedments" is also not a recognized term in standard English, as it adds an unnecessary suffix to a word that is already correctly used in its singular form.