Duet vs Duo: What are the differences?

What is Duet? Project Management for Freelancers and Small Businesses. Duet is an intuitive project management app created specifically for freelancers and small businesses. Duet does not have a monthly fee. Instead, it is available for a one time fee of $49.

What is Duo? A next-generation package manager for the front end. Duo is a next-generation package manager that blends the best ideas from Component, Browserify and Go to make organizing and writing front-end code quick and painless.

Duet can be classified as a tool in the "Project Management" category, while Duo is grouped under "Front End Package Manager".

Some of the features offered by Duet are:

• Tasks Management - Flexible task management allows you to create, assign, comment, and attach files to tasks. Drag and drop reordering. Multiple filter options and search. Integrated task timer.
• File Management - File gallery displays a preview of each file, helping you quickly identify the one you’re looking for.
• Visual Invoice Builder - Drag and drop tasks into the invoice builder to quickly create invoices. If the task has a time entry associated, it is automatically added to the invoice.

On the other hand, Duo provides the following key features:

• has first-class support for Javascript, HTML and CSS
• exposes a unix-y command line interface
• pulls source directly from GitHub with semantic versioning

Duo is an open source tool with 3.52K GitHub stars and 145 GitHub forks. Here's a link to Duo's open source repository on GitHub.