Any International biological science journals with average impact factor where article publication fee is nil or fairly low and also accepts articles from world wide not for members/ subscribers only .
PLoS ONE has a waiver policy for researchers not being able to pay the requested fee.
The journal also has three fee levels, according to the country you are from. Countries in list 1 are exempt from any fee, those on list 2 are asked to contribute with a 500USD fee. Others are requested to contribute 1350USD per publication.