While I was never a jazz player, when I was younger I did study a few of those tunes and considered myself an educated player with a good chord vocabulary and theoretical knowledge of music.
So, strumming through one of those blasts from the past, I needed to refresh my memory of a good inversion of a half diminished chord for the piece. (Django's "Tears".)

Off I went researching, and came up with a MONSTER site! All Guitar Chords
http://www.all-guitar-chords.com/

It has a picture of a guitar neck. Select the key, chord type, and click the get button, and the chord shape is displayed in bright yellow on the neck.
Not the right position? Click one of the numbered variation buttons. The number of variations depends on the chord: Cm9 shows 2 variations, Cmaj9 shows 6, Cm7b5 shows 10!

The guitar tuner shows a headstock, with the string names on the tuning keys. Click and the note repeats 'til you click the plectrum stop button.

you can have scales displayed, or input a series of notes to find the name of the input scale.

Click on songs: select Hotel California, for instance, and above the words and chords, is a list of chords used in the song. click on a chord and it is displayed on the neck. Depending on the chord, there are also variation buttons.
Click on chord names: click within the frets and add notes. The chords are named cumulatively as you add notes!

The Guitar Jam Machine is fun! Select a chord type,drag and drop from the neck onto the tab, hit play, and you have a backing track! The chords are named and displayed on the tab in the variation you selected.
You can design more weird progressions for your compositions than you ever would have thought possible!!!!

A link to the site is in my links list.