Free emulator software for linux

Wide Area Link Emulator enables you to set and test various parameters of a WAN access link (also known as a bottleneck link) before testing on a fully-functional network.

Any ISP has a high bandwidth LAN (of the order of tens of Mbps, e.g. Ethernet) and a WAN access link with relatively low speeds (of the order of a few Kbps to a few Mbps). To be able to evaluate the ISPs performance, actual tests will have to be conducted on a live, fully functional network. This would imply enabling certain features in communication equipment which could be detrimental to the proper functioning of a commissioned network. To address such a problem of being able to characterize/quantify the network operation in terms of its performance with respect to various parameters, a test-bed emulating the ISPs connectivity to the Internet would be an ideal solution.

An important factor in setting up such a test-bed, is emulating the WAN Access Link. Using complex hardware is costly. Such a link can however be easily implemented by emulating the scenario on popular physical technology such as Ethernet. By changing the TCP/IP stack on a Personal Computer, the rate at which packets are injected into the network can be controlled and other necessary features can easily be added.

WALE was implemented in 2 phases and the first version can emulated bandwidths up to 8Mbps and uses FIFO queues with drop-tail.

WALE v2 can emulate bandwidths of up to 80Mbps(a 10-fold improvement over version 1) due to the stripped down version of Micro-second resolution timer being used in the Linux kernel. WALE also implements differentiated services are recommended by IETF. A hash-based packet classifier is used to classify packets into one of 3 queues (Expedited Forwarding, Assured Forwarding and Best Effort). A simple priority scheduling has been implemented between the queues.

Version 2 has been implemented in the Generic Device Layer of the Linux Kernel. The kernel version is 2.2.19. WALE2 kernel patch can be downloaded here. An ncurses based front end has been implemented for setting and viewing various parameters of the bottleneck link.

Unix Amiga Delitracker Emulator (UADE) plays most Amiga music file formats by simulating Amiga hardware and software.
Unix Amiga Delitracker Emulator plays over 180 Amiga music file formats and has three frontends for playing: a command line tool, an XMMS plugin, and a Beep Media Player frontend.
Enhancements:
- An improved version of the Special FX replayer was added.
- A new Special FX ST replayer was added.
- Bugs in song length database handling were fixed.
- Audacious 1.3 is supported.
- 15 instrument soundtracker module detection is supported.

Qemu Launcher is a GNOME front-end for the Qemu x86 PC emulator based on GTK. Qemu is a command line application so I wrote this so that Qemu is more accessible from the desktop.
Main features:
- Create and save multiple VM configurations
- Disk image creation from the GUI using dd, qemu-mkcow, and vmdk2raw for raw, COW, and VMWare converted images respectively.
- Provides Qemu console access via xterm
- Configurations stored in users home directory in ~/.qemu-launcher
- Disk images can be stored anywhere

GXemul is a machine emulator Im developing in my spare time.
GXemul project emulates processors and surrounding hardware components, in some cases well enough to allow unmodified "guest" operating systems to run inside the emulator as if they were running on a real machine.
MIPS:
- Several machine types are emulated well enough to run guest operating systems. NetBSD, OpenBSD, Linux, and even obscure things such as Ultrix and Sprite can run, to various degrees.
ARM:
- CATS is emulated well enough to run NetBSD and OpenBSD as guest OSes.
PowerPC:
- NetBSD/prep can run (experimental).
The emulator can be used for:
- experimenting with operating systems which you have not tried yet, or operating systems for hardware which you might not have access to,
- running guest operating systems for historical purposes, e.g. Ultrix or Sprite,
developing portable software, when you want yet another target platform to try to compile your software on (you can use GXemul to run a guest OS and compile your software inside that OS),
- development of new firmware or operating system code (but then you need to be aware of some limitations),
- educational purposes...
Enhancements:
- NetBSD/pmppc can now run in the emulator (with root on NFS).
- For ARM emulation (with NetBSD/cats, OpenBSD/cats, NetBSD/evbarm, or NetBSD/netwinder as the guest OS), the emulator does not use 100% of the hosts CPU if the guest OS is idle.

Mamory is a set of usefull functions for emulators related projects.
Mamory project allows easy inclusion of roms management features into these projects through a simple API.
The distributed packages also contain a command line interface that use the potential of the library libmamory.so.
Enhancements:
- The embedded expat library has been removed: this release requires that expat is installed on your system.

GNOME FCE Ultra (also known as gfceu) is an interface for the popular Nintendo Emulator, FCE Ultra. GNOME FCE Ultra is designed for the GNOME desktop, and allows the user to easily play NES ROM images.
Main features:
- Network play
- Custom input configuration
- Fullscreen support
- Full sound support
- High compatibility and accurate emulation

EQEmu project is an Everquest server emulator.
The EQEMU project is an attempt to recreate the Everquest server software, runnable from a Windows or Linux machine.
Content is stored in a MySQL database, and allows you to create custom creatures, items, and quest content in game.
Many in-game functions are supported, and functionality is expanded week by week by a very active development group and by the support of the user community.
Enhancements:
- Compatible with ZoneProxy 1.4.
- Improvements made on the combination code.
- Combined packets now work to full extent.
- Fixed mob movement.
- Added AC. Probably needs major adjusting of values to match live, but its a start.
- Group inviting is fixed.