A few months back, in Copenhagen, I had the privilege to work with a team of enthusiastic students and a startup (provided a project for our class at CBS) that at the time was known as Tangerine District. Tangerine District was in private beta for some time but now Tangerine District has now gone publicly live as Worksy.
Worksy is perfect for startups that are looking to manage their work in a professional way. It is an online community of entrepreneurs combined with all the important tools and services a startup may need, such as CRM, website tools, calendars, e-mail etc. It helps you document and plan your activities as you push your startup forward.
Probably the best side to worksy is that it is free of charge (at least the limited version, which will easily get you started).
Check it out and become more professional.