This is a small sample of the packages available at https://cygwin.com/
Development
perl
python
Multimedia
cdrecord
flac
nas
Server
apache2
bind
lighttpd
nfs-server
openldap
proftpd
pure-ftpd
rsync
Network
autossh
geoip
gq
mutt
Unsorted
cron
ddrescue
bzip2
cadaver
rdiff-backup
rsnapshot
rsync
run
tar
unison2
unzip