In an IT room Padlet is an excellent resource for a starter or a plenary. Students can be asked to post a sticky note with something they have learned in the lesson or perhaps to ask a question. Students can simply o link to the wall, an account is not necessary. See Interesting Ways to Use Padlet in the Classroom where teachers have contributed ideas for inspiration.
Another possibility in an IT room is to ask students to create a word cloud of any vocabulary they know on a topic at either the beginning or end of a lesson.