Bitmask, by LEAP, is an application to provide easy and secure encrypted communication with a VPN. It allows you to select from a variety of trusted service provider all from one app. Current providers include Riseup Networks and The Calyx Institute, where the former is default.

vpnc is a VPN client compatible with Cisco's EasyVPN equipment. It supports IPSec (ESP) with Mode Configuration and Xauth. It supports only shared-secret IPSec authentication with Xauth, AES (256, 192, 128), 3DES, 1DES, MD5, SHA1, DH1/2/5 and IP tunneling. It runs entirely in userspace. Only "Universal TUN/TAP device driver support" is needed in the kernel.

StrongSwan is an IPsec implementation originally based upon the FreeS/WAN project. It contains support for IKEv1, IKEv2, MOBIKE, IPv6, NAT-T and more.

OpenConnect is a client for Cisco's AnyConnect SSL VPN, which is supported by the ASA5500 Series, by IOS 12.4(9)T or later on Cisco SR500, 870, 880, 1800, 2800, 3800, 7200 Series and Cisco 7301 Routers, and probably others.

User-level SOCKS and port forwarding proxy for OpenConnect based on LwIP. When using ocproxy, OpenConnect only handles network activity that the user specifically asks to proxy, so the VPN interface no longer "hijacks" all network traffic on the host.

OpenVPN implements virtual private network (VPN) techniques for creating secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities. It uses a custom security protocol that utilizes SSL/TLS for key exchange. It is capable of traversing network address translators (NATs) and firewalls.

n2n is a light VPN software which makes it easy to create virtual networks bypassing intermediate firewalls.

sshoot provides a command-line interface to manage multiple sshuttle virtual private networks. It supports flexible profiles with configuration options for most of sshuttle’s features.

This is a helper script to allow you to interactively login to a GlobalProtect VPN that uses SAML authentication, so that you can subsequently connect with OpenConnect.

Openfortivpn is a client for PPP+SSL VPN tunnel services. It spawns a pppd process and operates the communication between the gateway and this process. It is compatible with Fortinet VPNs.

vpn-slice is a replacement for vpnc-script used by openconnect and vpnc. Instead of trying to copy the behavior of standard corporate VPN clients, which normally reroute all your network traffic through the VPN, vpn-slice tries to minimize your contact with an intrusive VPN. This is also known as a split-tunnel VPN, since it splits your traffic between the VPN tunnel and your normal network interfaces.

By default, vpn-slice only routes traffic for specific hosts or subnets through the VPN. It automatically looks up named hosts, using the VPN's DNS servers, and adds entries for them to your /etc/hosts (which it cleans up after VPN disconnection), however it does not otherwise alter your /etc/resolv.conf at all.

Vulkan-Headers contains header files and API registry for Vulkan.

Utility libraries for Vulkan developers.

The SPIR-V Tools project provides an API and commands for processing SPIR-V modules. The project includes an assembler, binary module parser,disassembler, validator, and optimizer for SPIR-V.

Vulkan-Headers contains header files and API registry for Vulkan.

vkd3d is a library for translating Direct3D 12 to Vulkan.

SPIRV-Headers is a repository containing machine-readable files from the SPIR-V Registry. This includes:

• Header files for various languages.

• JSON files describing the grammar for the SPIR-V core instruction set, and for the GLSL.std.450 extended instruction set.

• The XML registry file.

Volk is a meta-loader for Vulkan. It allows you to dynamically load entrypoints required to use Vulkan without linking the Vulkan loader. Additionally, volk simplifies the use of Vulkan extensions by automatically loading all associated entrypoints. Finally, volk enables loading Vulkan entrypoints directly from the driver which can increase performance by skipping loader dispatch overhead.

Vulkan-Tools provides tools and utilities that can assist development by enabling developers to verify their applications correct use of the Vulkan API.

vkBasalt is a Vulkan post processing layer to enhance the visual graphics of games.

Currently, the built-in effects are:

• Contrast Adaptive Sharpening

• Denoise Luma Sharpening

• Fast Approximate Anti-Aliasing

• Enhanced Subpixel Morphological Anti-Aliasing

• 3D color LookUp Table

The LLVM/SPIR-V Bi-Directional Translator is a library and tool for translation between LLVM IR and SPIR-V.

Vulkan allows multiple Installable Client Drivers (ICDs) each supporting one or more devices to be used collectively. The loader is responsible for discovering available Vulkan ICDs on the system and inserting Vulkan layer libraries, including validation layers between the application and the ICD.

Shaderc is a collection of tools, libraries, and tests for shader compilation.

SPIRV-Cross tries hard to emit readable and clean output from the SPIR-V, aiming to emit GLSL or MSL that looks like human-written code.