Question: I would like to have the same editor available on all of the platforms I frequent.

Emacs and Vi are not desired solutions.

Answer: 
From <http://help.eclipse.org/help21/topic/org.eclipse.platform.doc.user/tasks/running_eclipse.htm>:

Use the following command-line argument:

```
-data your_workspace_location

```

For example, 

```
-data c:\users\robert\myworkspace

```

you can also use UNIX-style relative path names such as

```
-data ../workspace

```

even under Windows, in case something doesnt like colons or backslashes in parameters, like Jumplist Launcher
note that you can use UNIX-style relative path names such as

```
-data ../workspace

```

even under Windows, in case something doesn't like colons or backslashes in parameters, like Jumplist Launcher