Fortin Amplification Zuul

Original info:
"ZUUL is the most transparent noise gate on the market! Studio quality specifications with simple straight forward operation. The ZUUL’s threshold knob also controls the dynamics of the gate circuit. Perfect for guitar, bass or any signal source as it has studio quality specifications. Use in front of an amplifier or in a series effects loop. Dual colour LED for visual feedback gating action: Green = Open, Orange = Closed, Off = Bypass. The KEY input signal can be directly from your guitar (ex. split from ROACH or SPLIFF) or other signal source which lets you go from clean to high gain without changing the Threshold knob. This powerful feature lets you control the gate with a different signal than what flows through the input/output jacks of the ZUUL. Side switch or internal jumper to change the threshold range if you are injecting a large signal into the input and not using the key input"
You can find PedalPCB's schematic, info and pcb on their website here.

Paia 5730 Gator

Here is a great sounding Attack Delay / Noise Gate / Swell pedal.
I've used a more common LM13700 instead of LM3080.
You can find original project and scheamtic here.
I could not find any videos for this effect but there are some sound samples available here.
The original effect uses a momentary SPST footswitch.
I've also added an unverified true bypass version.
If you don't want the External Trigger just remove it and connect Thresh 1 to LM308 pin 2.

Madbean Fencepost (Noise Gate / Expander)

Here is Brian's version of Armdnrdy's project from the DIY Forum.
You can find the original thread with all the infos here and Brian's version here.

Ibanez NB-10 Noise Buster

Original info:
Unlike conventional noise gates, the IBANEZ NB 10 Noise Buster is capable of cutting out noise not only while there is no signal flow, but during actual playing as well, thus providing far more effective noise reduction. A FREQUENCY control lets the musician eliminate noise components without impairing the envelope or sustain of the original sound. With the NB10, players are liberated from the adverse influence of stage lighting or single coil pick-ups on their music, and high gain distortion effects can be used without having to worry about noise.

MXR Noise Gate

Geiri has worked his way through with this and he offers couple pointers to enhance it, or to get it working better. So with these mods this one should get this running like intended. (I'll be fixing the layouts tonight..)

1. Important - the 2n3904 (I used 2N5088) must be matched. I made them exactly the same hFE.
2. Change 680R to 4.7K (gets rid of the oscillation problem)
3. The 1M that's going from JFET Gate (the one that goes down to the second last row, change it to 1.8K

I don't think the hFE matters, as long as it's matched. I haven't tried lower hFE. Mine are medium/high.. can't remember

Changing the 1M to 1.8K gets the level back to normal

 

First, the stock version with only the sensitivity/threshold control (it is called sensitivity in the Tonepad project files):

Then the highly modded one. With added controls for Attack, Release and Attenuation levels. Also, added momentary single pole stomp switch - This one acts as a momentary kill switch for gate.