The Adventurer's Ordinance is exactly what it sounds like a 110 magic items geared for Advanced Dungeons & Dragons first edition. These magic items can be quite useful for seeding adventure locations & dungeons. They can also set the tone for a campaign very nicely & they could be used to add in a whole other aspect of mythology to your games.
Grab It Right Over
Here are over 110 magic items in twenty six pages for any old school style game. A great free resources for details magic items with a great bit of background to add to your campaign. Many of these items have back stories that can be adapted for a science fantasy or science fiction campaign. Yeah I'm thinking 'Thundarr the Barbarian' style post apocalyptic or a science fantasy campaign.
Using The Adventurer's Ordinance
For Your Old School Campaign
The author covers most of the major areas including equipment and magic items, along with some background to incorporate these items into your games.
Best of all this twenty four page pdf is free.