Double Commander(https://doublecmd.sourceforge.io/) is a free cross platform open source file manager with two panels side by side. It is inspired by Total Commander and features some new ideas，Double Commander is developed with Free Pascal and Lazarus.
since I am not a developer,If someone ported it to Haiku it is very good,thanks?
Hello zztt-ld,
You can use BeSly’s Dateimaster. It is available for both architectures (32 / 64bit)
https://software.besly.de/index.php
Regards lorglas
I tried to compile it a few years ago. The fpc port for Haiku does not have the fpc-units it needs. It will be possible to look again, but after the release of the new version of freepascal.
You can create your own one using the desktop. Open two windows and stack them one each other. The commands you need are available over the right mouse menu 
oh…i’ll try if i have some time… btw i’ve compile peazip on windows… i don’t know it compileable on haiku or not…
Thanks everyone, hope you success
Any news? Suddenly discover Haiku is near ready for my humble production usage 
First of all you need Lazarus with qt5.
Today i success having Lazarus 2.1.0 working with qt5 under Haiku 64 bits, but is not stable.
I have downloaded double commander source code and load doublecmd.lpi but it need some extra packages.
SynUni (>=1.8) Installation have 1.0
dcpcrypt( >=3.0)
chsdet
pkg_gifanim (>=1.4)
cmdbox
KASComp (>=1.8)
viewerpackage
doublecmd_common (>=0.3)
Other proyect also developed with Lazarus CudaText need additional packages:
BGRABitmapPack
encconv_package
emmet_package
atsynedit_cmd_package
atbinhex_package
atflatcontrols_package
atsynedit_ex_package
python4lazarus_package
econtrol_package
Peazip:
Pea Compiles but peach need something else
LazSQLX:
Throw errors uses 47 units, peazip more and more.
jma_sp Can you try to buld Double Commander with Lazarus 2.3.0 ?