The default shortcuts for moving to beginning or end of (wrapped) lines are ⌘← and ⌘→. ⌥↑ and ⌥↓ or ⌃A and ⌃E move to the beginning or end of unwrapped lines (or paragraphs). ⌥← and ⌥→ move backwards/forward by words, and all of these are compatible with holding Shift to select during the corresponding moves.
You could remap home and end by creating ~/Library/KeyBindings/ and saving a property list like this as DefaultKeyBinding.dict:
{
"\UF729" = moveToBeginningOfLine:; // home
"\UF72B" = moveToEndOfLine:; // end
"$\UF729" = moveToBeginningOfLineAndModifySelection:; // shift-home
"$\UF72B" = moveToEndOfLineAndModifySelection:; // shift-end
}
Most of the keybindings for editing text in OS X are defined in /System/Library/Frameworks/AppKit.framework/Resources/StandardKeyBinding.dict.
Applying changes requires reopening applications. DefaultKeyBinding.dict is ignored by some old versions of Xcode (works with latest version 6.3.1), Terminal, and many cross-platform applications.
See Cocoa Text System and my website for more information about the customizable keybindings.
Terminal's keybindings can be customized in Preferences > Settings > Keyboard. \033OH moves to the beginning of a line and \033OF to the end of a line.
In Eclipse, key bindings should be modified in Preferences > General > Keys. You need to modify default bindings for commands Line Start and Line End (replace ⌘← by ↖ and ⌘→ by ↘). For selection to work, also modify Select Line Start and Select Line End.
PS: You may need to logout and login again for the ~/Library/KeyBindings/DefaultKeyBinding.dict change to take effect.
I remember having the same problem in some apps after upgrading to Lion. A reboot fixed it for me.
Workaround: use Ctrl+A (instead of ⌘+←) to move the cursor to the beginning of the line and Ctrl+E to move the cursor to the end of the line (instead of ⌘+→). This works in all Cocoa-based applications.
Best Answer
You can use Emacs set of shortcuts: