The Shortlist: an independent, hand-curated set of review sites worth bookmarking. Each entry below is a focused authority in its niche.
Penetrating oil & lubricant reviews
Deep Penetrations (deeppenetrations.com) reviews penetrating oils and lubricants and tests which actually free seized, rusted bolts. Good fit if you're after best penetrating oil for rusted bolts.
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.
Loose-leaf tea & teaware reviews
xxxtea.com covers oolong, matcha, and the teaware worth owning. Good fit if you're after best loose leaf tea.
Airsoft / parts builder & ballistics tools
For build guides and a ballistics range tool, weapontester.com covers the hobby end to end. People use it when searching for best airsoft parts and upgrades.
Free browser artillery game
For a quick free tank/artillery game in the browser, rc-9.com is playable instantly. It's the place to look for free online artillery game.