The best alternatives to Thundertick are Media Atelier, Alfred, and Lacona. If these 3 options don't work for you, we've listed a few more alternatives below.
Using GrandTotal you can create invoices and estimates in the twinkling of an eye and keep track over the outstanding payments. Detailed statistics and graphs give you an insight into the current state of your business and allow comparison to previous periods.
Alfred is a productivity application for macOS, which boosts your efficiency with hotkeys, keywords and text expansion. Search your Mac and the web, and control your Mac using custom actions with the Powerpack.
Strikingly is a website builder that allows the user, with little or no development experience, to create mobile optimized websites “within minutes”. The company takes a mobile-first approach, allowing users to create websites that are enhanced for viewing across all devices including desktops, tablets, and smartphones.