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# convert all character columns to factors
df <- data.frame(matrix(unlist(l), nrow=132, byrow=T))

# do not convert character to factor
df <- data.frame(matrix(unlist(l), nrow=132, byrow=T),stringsAsFactors=FALSE)

# using rbind()
do.call(rbind.data.frame, your_list)

# usind plyr
library (plyr)
df <- ldply (l, data.frame)