gamescope : Micro-compositor formerly known as steamcompgr ( https://github.com/Plagman/gamescope )
sidewinderd : Linux support for Microsoft SideWinder X4 / X6 and Logitech G103 / G105 / G710+ ( https://github.com/tolga9009/sidewinderd )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a myrvolay
For Paludis use this rsync : rsync://gentoo.zugaina.org/myrvolay-portage
If you have a problem : ycarus(-at-)zugaina.org