Run Off Groove Peppermill
Here’s a nice transparent drive from Runoffgroove.com. Not a ton of headroom apparently, but has a nice bluesy tone. In the layout, Q1 is oriented for a 2N7000, so if you use a BS170 be sure to rotate it 180º.
Boost
Lovepedal Woodrow
This is one of the many variations of the old Electra Distortion. Sounds like a cranked Tweed 5E3 amp. The original Lovepedal Woodrow has just a volume knob, but it’s easy (and useful) to add a gain control. If you just want one knob, connect Gain 3 to Gain 2.
Range Blaster
From Fuzz Central, this is a modified Dallas Rangemaster treble booster. Uses an NPN germanium transistor so you can daisy chain it with other pedals that run off a positive 9 volt supply.