Pools tools
Indie products their makers tagged "pools", most upvoted first.
IndieNeed is a launch site for indie makers.
The most upvoted products on IndieNeed with this tag. Tags are chosen by each maker.
Ranked products

Home Yard Calc
Home Yard Calc is a set of free material calculators for gravel, mulch, topsoil, compost, pavers, sod, tile, grout, wallpaper, and backyard pool volume and salt.
Browse the best tools by category or every product.