Creating own posters by matching images and languages engage learners who display well in Linguistic/Verbal intelligence. This activity probably might fit in any subject. (eg. Making advertisement or campaign poster for environmental issues in LOTE or SOSE, or creating poetry with images in English class). Glogster enhances learners' creativities.
What a great format for student presentations! Really sad how so many of the young contributors have such a gloomy outlook on life. This would make it hard for the site to be available on school servers but I think it would be a shame to have to censor some of them.