Here are some R packages I wrote.
aqtr: Download Air Quality Data for Turkey
auobs: Interface to Ankara University OBS
cbRt: Interface to EDDS of CBRT
kgsr: Download Data from KGS
rnass: Interface to NASS Database
tbat: Download Data From the Banks Association of Turkey
tuik: Download TUIK Data
turkeymap: Provides City and District Data for Turkey
If you see mistakes or want to suggest changes, please create an issue on the source repository.