3rd Declension I-stem Nouns

Does anyone know where I might find a list of 3rd Declension I-stem Nouns?

What exactly are you looking for? A list of all of them? All you need is a representative sample and a sense of how they are formed, which you can find in any beginning Latin text. Here is a quick summary:

Masculine and Feminine Nouns

  1. Ending in -es or -is in the nominative singular and having the same number of syllables in the genitive singular.

hostis, hostis, m., enemy
caedēs, caedis, f. murder

  1. Ending in -ns, -rs or -bs in the nominative singular

īnfāns, īnfantis, m. baby
mors, mortis, f. death
urbs, urbis, f. city

  1. of one syllable in the nominative singular whose base ends in two consonants

nox, noctis, f. night.

Neuter Nouns

Particularly neuter nouns ending in -al or -e. If you haven’t learned third declension adjectives, these will help you the most when that time comes.

animal, animalis, n. animal
mare, maris, n. sea

And cave canem! Canis, canis m/f is not an i-stem.

I was looking for a list of all of them (or at least the more common ones), because of words like canis and others that don’t follow the rules and I did find one here:
http://www.cultus.hk/latin_lessons/declension/index.html

for those that are interested. It includes other declensions as well.