<div>In response to your first question, "yes, lots".</div>
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<div>Right of the top of my head, the big ones I use are "Gods of Glorantha", "Elder Secrets", and "Land of Ninja". Oh, and "Vikings".</div>
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<div>For information to use in non-Gloranthan campaigns, the Alternate Earth-related boxed supplements work well. The best ones, IMO, are "Land of the Ninja" and "Griffin Island", with "Vikings" running a close third. My current campaign uses spells and background elements of all the supplements I've mentioned and has for years (I've run it multiple times over the last two decades).
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<div>I've also gleaned spells from various old Dragon magazine issues, in addition to all the RQ published supplements and the websites of other RQ fans, compiling quite a list. <br> </div>