Here are a few chord fingering charts I've created detailing fingerings of some of the more common chords.  I've only listed the fingerings that I find the easiest and most comfortable to use; there are many other alternatives that may work better for you.
 
I've left out several inversions because their fingerings were too difficult without the use of open strings (all chords are listed in closed positions).
 
The majority of the fingerings I've listed can be played on a four-string, and all can be played on five (or more) strings.
 
It's often difficult to hold a four-note chord on a bass, so I've included the fingerings for some chords without including the 5th on the far right of each chart as the 5th is usually the least important degree in a chord, unless it is altered (b5, aug5, etc.)
 
The horizontal lines represent strings, and the vertical lines represent frets.  I've designed these charts to have a direct visual connection to how you look down at your fretboard (as opposed to common guitar chord charts, which usually have the strings represented with vertical lines, which is not how you look at your fretboard when playing).
 
As these are general chord fingerings and not specific to certain chords (meaning it will show you how to play a min7 chord for any note, not just an Amin7), the strings represented in the charts do not have to be any particular strings on the bass.  They can be B-G, E-C, etc.- any five strings that are tuned in fourths.

These are best for viewing on your monitor

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These are best for printing

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I've received a few requests asking how to use these charts, so here's a small video explaining them: