Eclipse has three very useful features, two of which are in FD in a limited form:

Eclipse: Selecting a block of text and pressing Ctrl+Alt+Down duplicates the block, with indentation preserved.
FD: Currently, this is limited to a single line in FD (Ctrl + D);

Eclipse: Selecting a block of text and pressing Ctrl + D deletes the block of text.
FD: Ctrt + Shift + D deletes the current line.

Eclipse (with anyedit): Trim trailing spaces on file save
Another very useful feature.

Block duplications and deletes are very useful, and even trimming trailing spaces on file save. Any chances of implementing these?

How about selecting a block of text and hitting delete.

All these functionalities exist in FD... maybe not the way you are used to.



Select a block, hit Ctrl D, it duplicates the block with identation.



Select a block, hit Del.



Install FlexFormatter, configure the trailing spaces the way you want, hit Ctrl Shift D and it formats the code the way you want.

As others mentioned earlier, all this functionality is already implemented.
You don't have to install the plugin to trim spaces, it's already in FD:
Tool -> Program Settings... -> FlashDevelop -> Formatting -> Strip Trailing Spaces

what's cruelly missing (is in eclipse - and has been requested a few times already) is the move line/block up or down.

Ooops, my bad, I didn't know that.