tif22pnm is a command line utility that converts between TIFF sampled images and PNM images (both directions), using the libtiff library, but not using NetPBM. tif22pnm is similar to the tifftopnm utility in the NetPBM distribution, but tif22pnm handles a wider range of TIFF files and is able to output the alpha channel as a PBM or PGM file. png22pnm, a converter from PNG to PNM, is also bundled into the distribution.
