Hears how it really is: ROMs are copies of commercial games and are always illegal. Now since we can't stop you from obtaining these illegal files, we can and will not let you post them here.
Now with that in mind, IPS and various patches, tools, and so on are not copies of commercial products in and of themselves.. they are the work of the author. Thus we allow those authors to post THEIR work should they so desire.
These changes still may use protected code, be a derivative work or not. The authors/users are responsible for their own files. The community doesn't solicit them nor approve/disprove them. Using these files is up to each person who may download them. We neither warrant nor support them at all.
As for most tools, if its open source, it can be posted and/or linked to. Also a link to commercial, shareware, donationware tools (TOOLS only) is allowed as long as it is a generic link to the maker's page.