Here are a some tools that is useful to know about when working with Ops Mgr 2007:

• Create URL Monitor, script to create url monitors, download
• Agent MM, a command line tool to place OpsMgr agents into Maintenance mode, download
• Creating overrides using the SDK, download
• DumpMpContents, dump the contents of a management pack, download
• GroupMM, takes a group and puts all the computers in the group, download
• MP2XMLDUMPER, export MP to XML, download
• MPTOXML, Converting a sealed management pack to readable XML, download
• MPViewer, show the contents of a management pack, for example rules, monitors, views, tasks, console tasks and reports, download
• OpsMgr 2007 Database and Data Warehouse Size Calculator, download
• Agent Proxy Configuration Tool, download
• ProxySettings, enabling proxying for agents, download
• Run As profile configuration helper, configure a RunAs profile for agents in bulk, download
• Counts and displays the number of security events generated every second, download
• How to specify which RunAs account to use for a particular RunAs profile on a particular agent, download

Thanks to Stuart B. Renes for the list.