Terra is a GTK+3.0 based terminal emulator with useful user interface, it also supports multiple terminals with splitting screen horizontally or vertically. New features will be added soon. It's very new and experimental project, if you want to contribute just checkout and try.
Python
Latest commit 5179eb5 Mar 1, 2016 @ozcanesen Update Readme

README.md

This repository is outdated please use Sixdsn's fork at (https://github.com/Sixdsn/terra-terminal)

Terra Terminal Emulator

Terra is GTK+3.0 based terminal emulator with useful user interface, it also supports multiple terminals with splitting screen horizontally or vertically. New features will be added soon. It's very new and experimental project. I'ts written in python with python-gobject, If you want to contribute just checkout and try. I really appreciate the bug reports.

Installing Terra

Ubuntu 12.04 / 12.10 / 13.04

sudo add-apt-repository ppa:ozcanesen/terra-terminal

sudo apt-get update && sudo apt-get install terra

Archlinux (AUR) (package created by willemw)

https://aur.archlinux.org/packages/terra-bzr/

Gentoo (package created by Julian Ospald (hasufell))

http://packages.gentoo.org/package/x11-terms/terra

Reviews about Terra

WebUpd8: Link Link-2

HecticGeek: Link

Ubuntu-TR (Turkish): Link

Ubuntu-TR Sudo E-Magazine (Turkish): pdf

ILoveUbuntu: Link Link-2 Link-3 Link-4

OsArena (Greek): Link