The gang at Audified are giving away a Phaser plug-in with a summing tube amplifier emulation.
It requires you to create an account and give some personal info, so if that's a bridge too far then stop reading now.
This effect is comprised of an emulation of analog phaser effect and Summing Tube Amplifier (STA) which mixes the wet and dry signal as well as it adds a nonlinear distortion resulting in more vintage sound. Primarily, this effect is designed to be used as an insert effect to fully exploit the summing circuit. The plugin has also a “Wet only” option when only the effected signal is processed by the tube circuit, which allows to use the plugin also in a send bus.
DAW application supporting VST 2.4/VST 3/AAX/AU (Mac only) formats
PC: CPU with SSE2 support (Intel Pentium 4 or AMD Athlon 64 and newer), Windows Vista, Windows 7, 8 (32-bit/64-bit)
Mac: Intel Core, Mac OS X 10.7, 10.8, 10.9, 10.10
CPU speed 1.5 GHz, 50 MB of HDD space, Screen resolution at least 1024x768 (recommended 1280x800 and more)