Here is a listing of some of the useful links to free data sources that include weavers (family Ploceidae) on the web.
Generally these sites have records that are dated and georeferenced with confirmed species identifications.

Photos
PHOtos of Weaver Nests - Animal Demography Unit (PHOWN)
Birds of the world - Internet Bird Collection
Photos of African birds - African Bird Club
Photos of southern African weavers - Animal Demography Unit, Birdpix
Photos of Tanzanian birds (hover over Ploceidae1 or Ploceidae2)

Videos
Birds of the world - Internet Bird Collection
Birds of the world - Cornell

Calls
African birds - xeno-canto
Asian birds - xeno-canto
Birds of the world - Internet Bird Collection
Birds of the world - Cornell
Avian Vocalizations Center (search on species)

General
SABAP1 and SABAP2 maps
West African Bird DataBase
BirdLife International species page (click on 'show items' to see species list; good summary of info with emphasis on conservation status)
Avibase (comprehensive list of names in many languages)
Wikipedia (limited info for most weaver species)
Zoonomen - Zoological Nomenclature Resource (notes on taxonomy)
Specimen database - GBIF (not the easiest site to navigate)
List of African bird atlas projects
Namibian bird data

Literature
Biodiversity Heritage Library (search on species; returns list of free pdfs)

Weavers on stamps
See links here