Collaborative invoice and time tracking Nutcache is a multilingual online application for invoicing, expenses tracking & time management. Nutcache is the perfect solution for small business and freelancers. Provide your clients with a quality invoicing experience by creating an unlimited number of invoices and estimates with your own logo, and quickly send them to an unlimited number of clients so you get paid faster, letting you spend your time doing more important things. We also offer a Pro version with more advanced features.