Today a colleague of mine (Thanks Alex Passfall) showed me a simple ftp server under mac:

pip2 install twisted # if not already
sudo twistd -n ftp -p 21 -r Downloads

After that you can access all the files in the specified directory through ftp. Awesome stuff!

aci-lab-as01#copy ftp://10.32.32.184/file.lic .
Destination filename [file.lic]?
Accessing ftp://10.32.32.184/file.lic...
Loading file.lic !
[OK - 814/4096 bytes]

814 bytes copied in 0.084 secs (9690 bytes/sec)

Thanks @Samuel Heinrich for spell checking 😉