Statistical software packages
In addition to R, there are other statistical software programs in use today such as Stata, SPSS, and SAS. Files from these programs can be read in using the haven package.
Reading R data files
You can save an R object directly as a .Rda or .RData file. These can be loaded back into a new environment with the command load('folder/data.Rda').
Stata
haven::read_dta('file.dta')
SPSS
haven::read_sav('file.sav'), or
haven::read_por('file.por') for an older file type
SAS
haven::read_sas('file.sas7bdat')