Roman here, maker of Portal
As a product designer myself I always felt that the whole freelancing process of sending proposals, collecting payments, transferring deliverables was way too convoluted and hideous.
So I got this ideas for Portal - a digital space for your freelance project that replaces PDF proposals and invoices, and allows you to easily collect payments, down payments, tips, run subscriptions and share large deliverables easily and in one place. There's a heavy focus on customization, so that you as a creative freelancer can express your skill and your taste.
I'm building Portal primary for creative professionals like me, but either way, whether you're one or not, I'd love to hear your opinion.
Also worth mentioning, the waitlist is there only to allow people request early access while I'm polishing the final details. The app itself will be available within the next couple of weeks :)