SaaS 1000 - Free exportable list of the fastest growing SaaS companies
pickSaaS - Hundreds of SaaS products, analyzed.
hotglue - An embeddable data integration tool for B2B developers built on the Python ecosystem.
Inside SaaS Sales - 1000+ sales emails and voicemails from top SaaS companies
MuleSoft - MuleSoft provides an integration platform for connecting any application, data source or API, whether in the cloud or on-premises.
Micro-SaaS - All you need to build your own SaaS at one place.