I'm pondering a rewrite of my console-based mail-client.
While it is "popular" it is not popular.
I suspect "console-based" is the killer.
I like console, and I ssh to a remote server to use it, but having different front-ends would be neat.
In the world of mailpipe, etc, is there room for a graphic console client? Possibly.
The limiting factor would be the lack of POP3/IMAP.
Reworking things such that there is a daemon to which a GUI, or a console client, could connect seems simple. The hard part would obviously be working the IPC and writing the GUI. Any toolkit selected would rule out 40% of the audience.
In other news I'm stalling on replying to emails. Irony.