Useful SaaS and Softwares

cron-job.org - Scheduled execution of your websites and scripts
Parse - The Complete Application Stack
Supabase.io - The open source Firebase alternative.
Formspree - Create beautiful, accessible, highly customized forms

No-Code Apps

Bubble - The best way to build web apps without code
glide - Build an app from a Google Sheet in five minutes, for free.
Adalo
Carrd - Simple, free, fully responsive one-page sites for pretty much anything.

More No-Code apps: 21 Best No Code Tools You Need To Try