Yep, Kjaerhus Audio is a page that should be checked.
Not all of the plugins are free, but there are a lot of free plugins, suitable for everything, in fact all of the "Classic" series are free.
Classic Chorus is a great sounding and easy to use classical Chorus VST plugin. Nice Plugin for adding Depth, Fatness and Stereo perspective to almost any Electrical Instruments or Vocal.
Classic Compressor is a classic analog style VST Compressor Plugin with a lot of warmth and punch. Special designed to use on individual Instruments and Vocal, but also useable on your final mixes.
The Classic Delay emulates three of the most commonly used delays / echo sounds types: Tape, Analog, and Digital, but without the introduction of noise. A quality control is included where the sound of the echo machine can be adjusted to give the preferred amount of "imperfection". The delay can be synchronised to the host, and the feedback can be reversed to give a ping-pong effect.
Classic EQ is a 7 Band Stereo Equaliser with a warm analog sound, well suited to make non-surgical tonal corrections on all instruments, vocals and final mixes. The passive and additive structure, together with unique "Warm" and "Saturation" algorithms, produces warm and pleasant sound, just like some of the most expensive vintage gear. The left and right channels can be adjusted individually or linked together.
Classic Flanger takes you to a trip back to the mid 80's. It will give you that subtle or massive swirling effect that is used mainly for guitar, but can be used for many other instruments as well. Due to a tightly controlled feedback path, it is possible to boost the flanging effect to maximum without getting unwanted side effects.
The Classic Master Limiter VST plugin is specially designed to boost the overall level of your final mixes, but is also highly useable on very dynamic instruments. With just one control on the front panel operation is as simple as it gets; just turn the Threshold down and hear how your mixes gets louder and louder. Very high compression ratios can be obtained without changing the balance of the mix.
The Classic Phaser emulates analog phasers from the 70's and 80's. These vintage phasers got their characteristic sound from the analog phase shifting filters used, unlike the delay lines used in most modern digital phasers. To get a deeper and fatter phasing effect, more filter stages were cascaded. The Classic Phaser works just like an analog phaser, and with selectable filter stages from 4 to 12, it can resemble anything from phaser pedals to expensive studio phasers from that time period.
Classic Reverb is a nice and smooth reverb that does a good job on almost any instrument. It can be adjusted to sound like most any acoustic space, ranging from a small shower to a large concert hall. With the "Hi-Damping" control, it is possible to change the sound from bright and sibilant to a more natural / warmer sound.
The Classic Auto-Filter is an analog modeled four-pole filter with resonance control. It can be used for creative effects like auto-wah-wah and filter sweeps, as well as a fixed filter for equalizing purposes. The filter is selectable between low-pass, high-pass, band-pass and band-reject (notch). The filter cut-off frequency can be modulated from the envelope follower and the LFO.