Teacher's Pet is a resource sharing site along the lines of Twinkl and Mrs. Pancake. Like Twinkl it is still a new site (in case you aren't up on your UK educational scandals Twinkl and Teacher's Pet have stepped in to fill the void as many UK schools and agencies are boycotting Sparklebox.)
Teacher's Pet has the usual array of signs and posters, dice and labels. There is a nice assortment of story and nursery rhyme prompts for younger learners that could be printed, laminated and have textures added to them for our learners. There are some nice feelings thermometers, self assessment fans (might be useful for alternative assessment) and emotions resources too. Not to mention curriculum resources for subject areas.
One of the ways I like to use the signs and posters on these sites is to make matching games for early readers (match the word Monday to Monday) or to make concept books by laminating all of the posters or signs in a set and binding into a book.