mbox2imap is a tool to migrate mailbox formatted mail messages to an IMAP server. It can migrate entire mailbox repositories like ~/.thunderbird/*.default/Mail/.
MSGViewer can display Microsoft Outlook MSG files without the requirement of having Microsoft Outlook installed. The mail messages can be displayed and attachments can be extracted.
A ping and traceroute daemon for IPv4 and IPv6.
A checker for the keyword density of a webpage.