https://culturedcode.com/things/ https://amzn.to/2MdI6G2  – Getting Things Done Book https://www.flippingheck.com/review-igtd-task-management-application/ – iGTD review from 2008 https://www.taskpaper.com/ https://kanboard.org/ https://www.getflow.com/apps/ https://medium.com/@chris.russell/integrating-things-3-with-microsoft-outlook-on-mac-63a9ba43abc3 https://gist.github.com/adamprocter/76c478f619567dc2dd092db72d8d471a https://www.patreon.com/procterbot Thing 3 trailer https://culturedcode.cachefly.net/things/videos/2017-05-16-allnewthings-release/meettheallnewthings-internal.mp4