Active-X Components
CHFire 
The Control allows you to add Ports and Programs to windows Firewall. The Ports, Applications and servers can be returned as a comma delimited string showing open and closed ports. The string returned can be formatted to include HTML to allow web based tables.
For Documentation click here
FetchSPF 
SPF establishes a policy framework and a sender authentication scheme that verifies the identity of email servers (domains) for incoming messages. The Control will return all the IP numbers associated with a domain which is using SPF Records
For Documentation click here