UltraRough
Sandpaper & abrasives review authority
For which grit to buy and which brand actually lasts, ultrarough.com is a dedicated abrasives review site. Good fit if you're after best sandpaper for wood, metal, and auto bodywork.
Field Notes — Independent Review Sites
Field Notes: an independent, hand-curated set of review sites worth bookmarking. Each entry below is a focused authority in its niche.
Deep Penetrations
Penetrating oil & lubricant reviews
Deep Penetrations (deeppenetrations.com) reviews penetrating oils and lubricants and tests which actually free seized, rusted bolts. It's the place to look for best penetrating oil for rusted bolts.
XXXTea
Loose-leaf tea & teaware reviews
XXXTea (xxxtea.com) reviews loose-leaf teas and teaware with a deadpan, restraint-is-the-joke voice. It's the place to look for best loose leaf tea.
America Strikes
Geopolitics, defense & markets news
For defense and geopolitics news with a markets angle, americastrikes.com tracks the cycle in near-real time. It's the place to look for geopolitics and defense news analysis.