Several Resis have brought up the suggestion of a "Snap to Edge" feature for Second Life recently. It's a simple idea: when building, or simply moving objects, it aligns the edge of one to the edge of another so they're THISCLOSE. The math is important and let's keep it aside for now and think of how practical it'd be: ever want to put a loveseat right atop your house's floor? And how about arranging fences next to each other? Maybe you'd like an easier way to hang that photo WITHOUT MAKING IT GO INTO THE DAMN WALL! (Which necessitates the cumbersome step of moving the wall, which leads to many worse things…) Currently, we can Snap to Grid, but it's not "intelligent". It goes by number, and even the Reference grid doesn't take into account the actual context of objects around it.

Fascinatingly, you may have noticed several of SL's own windows, like Inventory, will "snap" if you move them close to a corner of the screen. That autoalignment is without a doubt a big boon! Now consider applying this inworld.