Difference between pageblocktable,datatable and repeater?

PageBlockTable:

• PageBlockTable should be define inside pageblock or pageblocksection.
• PageBlockTable uses standard styles sheets to design a visualpage.
• It has the  required attribute "value".
• Column headers  will be displayed automatically.

DataTable:

• No need to write inside pageblock or pageblocksection.
• There is no required value.
• The  data can be displayed using  custom style sheets.
• we need to specify column headers explicitly.

Repeater:

• There is no proper alignment of data in repeater compared with DataTable.