Similar to Fetchmail

HSQLDB

HTML Tidy

HTTrack

Hypertable

Intelligent Input Bus

Internet/Intranet Input Method Framework

IKVM

ImageJ

InfraRecorder

Initng

InnoDB

Interactive Ruby Shell

Ispell

JACK Audio Connection Kit

Jigdo

Kawa (Scheme implementation)

Email client

List of email clients

Template:Email clients

Alpine (email client)

EM Client

Gnus

GroupWise