Phillippa Cleaves from Sydney has created a Prezi that outlines free (mostly) Web tools which teachers can use and they fit in nicely with  Blooms Taxonomy. The web tools are clickable throughout the presentation so here is the link http://prezi.com/gxgypkp67mka/ . Please note, the orignial source of this information was posted on edudemic. Many of the resources you may be familiar with, I just thought it was neat to group the resources according to Blooms Taxonomy.