Stigg - The first pricing & packaging API built for SaaS
Rootspace - Open source productivity SaaS app
Pdf.to - Convert PDF to Word, Excel, JPG, & from. Also compress PDF
Jotform - Free Online Form Builder & Form Creator
ZORP - Zorp is an easy to use No-Code Drag-n-Drop app builder for your internal teams.
ZEEF - Directory to share your knowledge on a topic.