Tigre syncs directories to buckets on S3. It is named for the Tigre river that feeds into the Amazon River.
Run python setup.py install to install the tigre script. Or just copy the tigre file to where every you wish.
Tigre uses a configuration file, ~/.tigre.rc. A different file can be specified by tigre -c somefile. The configuration file is in the JSON format. See tigre.rc.sample for a sample configuration file.