The Pokit tiny multimeter has been mentioned here before but there were some comments that it wasn't much use because it couldn't measure mains. Well all those that were holding out can now rejoice! They just announced they will be adding an option for CATIII probes which will allow for measurement up to 240VAC.
https://www.kickstarter.com/project...ts-in/posts/2076957?ref=backer_project_update
https://www.kickstarter.com/project...ts-in/posts/2076957?ref=backer_project_update