Send a link instead of trading emails about times. Calendly reads your real availability, lets clients book a slot themselves, and puts the video link, reminders and time zone handling in place without you doing anything.
One-click time tracking that tells you what an hour of your work actually earns. The free tier covers solo freelancers properly, and the reports are the bit that changes how you quote.
The simplest way to see what you are working on. Drag cards between lists to track jobs from enquiry through to invoiced, with a free tier that is genuinely usable rather than a trial in disguise.