Sieve - Easy sorting, filtering and pagination for .NET core
ChargeOver - ChargeOver automates recurring billing, subscription billing, & payment acceptance. A SaaS that integrates with Xero, Quickbooks, & has an API. Free trial.
Freelancer Stack - Curated directory of tools used by 10,000+ freelancers
MinuteDock - Web-based time tracking software designed to integrate with the Xero accounting package.
Freelance Rate Explorer - Visualize rates for thousands of freelance designers & devs
Elorus - A super-easy online invoicing & time tracking software