Inc. Magazine published a list of 36 resources that all startups should have if they want to be successful in launching on a tight budget but ensure that they cover all aspects of operations. Due was listed as an ideal startup resource for streamlining your invoicing and time tracking processes.
Other resources included:
Many more that are either free or very low-cost as well as cover areas like marketing, design, networking, payments and other necessary functions.
You can read the original Must-Have Startup Resource article here.
In offering even more tools and platforms, this Due.com post provides good resources for freelancers.