E-mail Clients (84 programs)

Pros: Vast improvement on the inbuilt Apple Mail search facility. Range of powerful search options.

Cons: Has to be kept running to complete indexing. Only works with Apple Mail.

Pros: Supports all platforms and email providers. Streamlined inbox and command centre for all messages.

Cons: As an open source application performance is tied to developer- and user-contributed extensions. Users who dislike the SaaS model might not appreciate the application.