fwblocker is a script used to parse syslog files for SSH, pure-ftpd and iptables entries. It will generate statistics but it's main feature is to lock out IP addresses that used a wrong username/password to log into your SSH or FTP Server.
Green Screen: A Linux based Advanced SyslogServer for Juniper NetScreen Firewalls - Can be expanded later to support other products. It can capture syslog messages, parse them, store them in a MySQL database. A Web GUI interface is also included.