I enjoy using Nearpod with my students. We use Nearpod as a formative assessment tool. I ask some questions where students must "draw" an answer. Most of my questions are "open ended" to allow students the opportunity to share their thinking.
Great question, I'm heavily into Google Classroom at the moment I'm loving the push of the homework, calendar other items being pushed out to my students. I really enjoy the easy marking and quick feedback so the students don't have to wait until the next time they, the teacher and their books are in the same room to read their difficult handwriting. (I do realise this isn't a creation tool!)
Teaching wise I love code.org I started our school computing curriculum this year with pencilcode and a plan to use python (which we still will) but code.org provides such easy to use coding stages for the children its allowed them to work at their own pace and with great enthusiasm, allowing me to support and push children as needed whilst they just fly. The teacher tool to allow you to look at the individual codes with the specific levels and children is fantastic.
Creation wise I'm using bookcreator a lot on the iPad due to its ability to incorporate lots of content and then publish ebooks the children can download regardless of device. There have been some great discussions on twitter on this topic and there are two fantastic padlets on it (another favourite tool) which are worth looking at @ictevangelist created a post on ios apps whilst Graham Andre used padlet to ask for suggestions for trainee teachers my own year 6 pupils came up with this list which again is mainly ios .