For type 1 hypervisors, I use Hyper-V for production VMs and ESXi for lab VMs. I am also playing around with XCP-ng / Xen Orchestra. For type 2 hypervisors, I usually use VMware workstation. I want to like VirtualBox, but I just don't. I've had too many issues with it in the past.
VMware is my favorite hypervisor since it is advanced. VirtualBox is a bit better for old software since it supports CGA more than VMware (e.g. VMware doesn't like the 640x200 CGA 2 colors mode) and it is a bit better for DOS/DOS applications but not good for really old DOS software since they rely on 4.77MHz
Whenever possible, I use QEMU. Other ones I use are Dolphin, Mini vMac, Basilisk II, Previous, RetroArch, SheepShaver, Shoebill, and Wine (if it counts).
I used to use Virtual PC back in the early days. In fact, I think it was the first virtualization software I ever used. I liked it. It's what eventually became Hyper-V.
For the ones asking about Hyper-V, it's pretty easy to use. If you have Windows 10 you can add it as a feature. But be advised that older OS's really don't work that well in Hyper-V. It's more geared for server virtualization and anything older than XP isn't going to work or isn't going to work well.
86Box Virtualbox SimH Qemu (for sparc and sometimes powerpc) DOSBox-X
Once in a blue moon I play with some emulators:
Model-1-2-3-4-TRS80GP-v2.3.1-(2020)(George-Philips) [trs-80; I don't remember the name of the actual program; the executable is trs80gp.exe] AppleWin mini-vMac
Well, I use VirtualBox, Virtual PC, VMWare, 86Box and PCem . I did use 86Box but because my computer isn't working, I use it in a tablet (temporarily using it until my PC is fixed) and it heats up the tablet where the fan is.
I move around to different operating systems fairly frequently (mainly because I don't have one main computer, rather I use several for different things) and as such I usually end up using VirtualBox. It's almost always worked very well for me and I like the interface.
Comments
For Apple/Mac:
Applewin-Apple II
Basilisk II-MacOS 7.0-8.1
Kegs32-Apple IIGS
LisaEm-Apple Lisa OS
MinivMac-System 0-System 7.55
Pce Macplus-System 1-System 7
PearPC-MacOSX 10.1-10.4
QEMU-MacOS 9.0.4-MacOSX 10.5
Sheepshaver-MacOS 7.5.2-9.0.4
Shoebill-A/UX
86box/PCem-Rhapsody Grail/Titan (x86)
For Windows,OS/2, Dos and all others:
86box
Dosbox
Hatari
Pce Macplus
PCem
Previous-Nextstep/Openstep
QEMU
Virtualbox
VMware
yeah i agree
For the ones asking about Hyper-V, it's pretty easy to use. If you have Windows 10 you can add it as a feature. But be advised that older OS's really don't work that well in Hyper-V. It's more geared for server virtualization and anything older than XP isn't going to work or isn't going to work well.
Virtualbox
SimH
Qemu (for sparc and sometimes powerpc)
DOSBox-X
Once in a blue moon I play with some emulators:
Model-1-2-3-4-TRS80GP-v2.3.1-(2020)(George-Philips) [trs-80; I don't remember the name of the actual program; the executable is trs80gp.exe]
AppleWin
mini-vMac
QEMU for 386 / PPC based OS
KVM for more modern systems
takeda-toshiya.my.coocan.jp/msdos/index.html
VDosPlus (no longer supported, but includes source code)
https://sourceforge.net/projects/vdosplus/
vdosplus.org/
Win31DOSBox: Windows 3.1 for 64-bit Windows
columbia.edu/~em36/win31dosbox.html
winevdm on 64-bit Windows
https://github.com/otya128/winevdm
Joe
columbia.edu/~em36/otvdm.html
Joe
VMWARE
MAME
SIMH
QEMU
PCEM
VIRTUALBOX
DOSBOX
BOCHS
EMU
MICROM8
PCE
SPECEMU
FUSE
ATARI800
BLUEMSX
ZXSPECTRUM4
EMMA 02
VICE
ORICUTRON
FMSX
JKCEMU
WABBITEMU
HERCULES
MZ8EMU
BKEMULATOR
CCS64
REALSPEC
UNREAL
Z80SIM
ALTIRRA
SPECCY
SHOEBILL
ZXMAK2
GXEMUL
ZEMU
SIM990
POCKEMUL
ZESARUX
MESS
XHOMER
B-EM
WINUAE
SUN2 EMULATOR (TME)
ARCULATOR
OPENMSX
BASILISK II
WINAPE
VIRTUALPC
CEMU
DPS/8
WINEIGHT
CONTRALTO
RAINBOW
ATOMULATOR
YAPE
MINIVMAC
86BOX
IBMULATOR
PREVIOUS
ALPHAVM
EMUPC
HATARI
WINARCADIA
VMAC
STEEM
SHEEPSHAVER
MAGIC PC
PEARPC
APPLEWIN
ES40
MZ800EMU
I did use 86Box but because my computer isn't working, I use it in a tablet (temporarily using it until my PC is fixed) and it heats up the tablet where the fan is.