Here's the beta version of my HLMV 2.0 project: Download.
Github repository can be found here.
Project website: https://samvanheer.github.io/HL_Tools/
See here for the current changelog. More information about other things can be found on the wiki.
I've tested this on Windows 8.1 and in a Windows XP virtual machine and everything works fine. if you experience any issues, you can report them either on the Github issue tracker or here.
For those who've been snooping around in the repository, the Angelscript Documentation Generator is up there as well, as well as an early stage Sprite Viewer. I'm designing the entire toolchain to be as reusable as possible, so expect to see many changes made to its code. Note that existing code taken from the SDK is being rewritten as needed. Don't expect it to be compatible with C or pre-C++11 code.
If i've missed any licensing requirements, let me know and i'll correct it.
A quick overview:
Most of the viewer is the same as Jed's, but some things have changed.
First of all, it supports SteamPipe. Unlike Jed's you have to specify not the sound directory, rather the game configuration like in Hammer. This enables it to find files in SteamPipe directories.
The mirror effect now uses the stencil buffer, which limits the mirrored model to the ground quad. It also uses a clipping plane to prevent the mirrored model from sticking out above the ground.
The ground quad size can also be changed now, up to 2048 units from the world origin.
The Weapon Origin panel has been merged with the Sequences panel; switching between free view and weapon origin view is done through a radio button group.
You can also mirror the model in any axis. Mirroring in the Y axis allows you to view CS models as right handed. Note that this is purely visual, it does not mirror the actual model (though support for that can be added).
Partial support for multiple models exists, but no UI option is present to use it. This would allow multiple models to be placed in the world. Eventually this will be used for a BSP viewer.
You can check the current changelog for more information.
Screenshot (crappy resize):