Mashable specifically designed for entrepreneurs, but if musical artists aren't entrepreneurs than no one is. The original post also contained 10 apps, but 2 of them didn't apply to the needs of an artist.
8. Monitter is service that monitors Twitter mentions in real-time in a multi-column interface reminiscent of TweetDeck
7. YouTube - it seems pretty obvious, but YouTube can be used for so much more than music videos like interviews, online press kits and virtual after-show parties, among many other things.
6. UserVoice can help track and manage the feedback of your users and customers.
5. MailChimp is an online email service that offers list management, tracking and analysis, and custom HTML templates for up to 500 subscribers and 3000 emails a month for free.
4. Get Satisfaction provides a forum where your fans can get answers to questions, solutions to problems, and submit feature and new product requests.
3. Twitter - it's more important than ever and this post on Mashable will give you links to best practices and tips for using Twitter.
2. Facebook - another one that everyone knows but not everyone takes best advantage of. Read the post on Mashable for helpful hints.
1. Basecamp is a great and cost-effective web-based tool for project management and collaboration that features to-do lists, milestones for important due-dates, file sharing, blog-style messaging, wiki-style writeboards, and time tracking. It's the perfect app for a busy band that has to juggle recording, rehearsals, tour dates, and social media management.