What is your application?
for 90% of the application a simple RC oscillator will do the job very good.
I am posting a simple oscillator circuit, you can replace the logic gates with any inverting HC gates.
The formula for the fequency is F=1 / 2.2RC
So a 100Kohm and 45pF will give you 101.0101Hz, close enough...
You should consider that the resistors are 1%-5% accurate and the capacitors are most likely 10% but again this is not the most accurate oscillator.