The 1D node turn a linear gradient into a spherical gradient. It can be useful for bump mapping. Adding it after any gradient texture to get a more bulgy look.
The Tile node take a 2D input (UV). It can quickly generate an interesting result, but also more limited. It has some known limitation i.e. changing the DiagonalScale parameter will also changes overall position, thus preventing using two same tiles with different diagonal scale.
Both of these node are composed by built-in node, so they can be used with GPU rendering. Hope you find them useful : )