What's the Bitwise Tunnnlier equivalent for Ubuntu?

Afaik there is no program that can do this for you for Linux. You can do this on Linux, but there isn't a pretty GUI for doing it.
Password-less login can be done by using ssh-keys (You might still want a password for you ssh-key, but you only have to enter it once!) Have a look here.

By configuring the ssh client on a host basis you can have individual settings for different hosts. Have a look at the file in /home/user/.ssh/config (it might not be there, but just create it.) Mine looks something like this:

CheckHostIP yes
ConnectionAttempts 3
ServerAliveInterval 10

Host router
        HostName 10.0.0.1
        User root

Host test
        HostName test.example.org
        User test32
        ForwardX11Trusted yes
        ForwardX11 yes
        Compression yes
        CompressionLevel 6

Host lucretia
        User lasse
        HostName 8.8.8.8

Host home
        User coax
        HostName 8.8.8.9

Host lovelace
        User lasse
        HostName 8.8.8.10

Host mailserver
        User lasse
        HostName 8.8.8.11
        ForwardX11 yes
        ForwardX11Trusted yes

Everything before the first Host deceleration is common to all connections. For more options look at the man-page for ssh_config.

When you have set up the config file then you can use ssh home instead of ssh 8.8.8.9 -l coax These options also applies to nautilus for ssh:// browsing.

You then have two options for quick launching a ssh terminal session, one is to create a gnome-terminal session for each and create launchers that runs gnome-terminal --profile='profile-name'.
The other option is to install sshmenu, imho not a super app, but it does a good job of supplying quick access to remote terminals.

Nautilus (Applications -> Accessories -> File Browser) provides support to connect to ssh servers and browse files over sftp and to save the connections as profiles (Saved data includes server name, share name, username, password).

To open sftp, go to Places -> Connect to Server... and choose "SSH" or FTP as the type and enter the rest of the details - see this guide for detailed steps. By giving a bookmark name, this connection profile will be stored for easy access in the left-hand side pane (View -> Side Pane).

Only thing I don't know a way to do within nautilus is "Open a terminal", for which u can use Putty, etc. Agree it is not yet as integrated as the option you mention, but it may be possible to find a way to "Open a Terminal" while on an sftp location to open an ssh connection in a terminal and jump to the directory.

Try HotSSH (found in the repositories). It manages the ssh connections very nicely, including connection sharing. I don't think it handles SFTP, though as someone else has noted, you can do that through Nautilus.

Pretty simple: PAC Manager. Download from http://sourceforge.net/projects/pacmanager/ or, even better, add the GetDeb page to repositories and then update and apt-get install pac

You manage the different connections in different programs that use them. Here's what you do:

• add the SSH as a mount using nautilus (Locations -> Connect to server) and mark 'add bookmark'

  • put your public key in the .ssh directory on the server. It's not smart to keep reconnecting with your real password all the time. You should be using a password less setup, if you want to prevent any man in the middle attacks.

  • gnome-do automatically indexes known ssh hosts, so you can connect quickly using that. There is also an ssh applet, and you can offcourse just add a few aliases to your bash.