secret-santa can help you manage a list of secret santa participants by randomly assigning pairings and sending emails. It can avoid pairing couples to their significant other, and allows custom email messages to be specified.
pytz pyyaml
Copy config.yml.template to config.yml and enter in the connection details for your outgoing mail server. Modify the participants and couples lists and the email message if you wish.
cd secret-santa/
cp config.yml.template config.yml
Once configured, call secret-santa:
./secret_santa.py
Calling secret-santa without arguments will output a test pairing of participants.
To send the emails, call using the --send argument
./secret_santa.py --send