The Collaborative International Dictionary of English v.0.48:

Kindly \Kind"ly\ (k[imac]nd"l[y^]), a. [Compar. Kindlier
   (k[imac]nd"l[i^]*[~e]r); superl. Kindliest.] [AS. cyndelic.
   See Kind, n. ]
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   1. According to the kind or nature; natural. [R.]
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            The kindly fruits of the earth.       --Book of Com.
                                                  Prayer.
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            An herd of bulls whom kindly rage doth sting.
                                                  --Spenser.
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            Whatsoever as the Son of God he may do, it is kindly
            for
            Him as the Son of Man to save the sons of men. --L.
                                                  Andrews.
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   2. Humane; congenial; sympathetic; hence, disposed to do good
      to; benevolent; gracious; kind; helpful; as, kindly
      affections, words, acts, etc.
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            The shade by which my life was crossed, . . .
            Has made me kindly with my kind.      --Tennyson.
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   3. Favorable; mild; gentle; auspicious; beneficent.
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            In soft silence shed the kindly shower. --Pope.
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            Should e'er a kindlier time ensue.    --Wordsworth.
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   Note: "Nothing ethical was connoted in kindly once: it was
         simply the adjective of kind. But it is God's ordinance
         that kind should be kindly, in our modern sense of the
         word as well; and thus the word has attained this
         meaning." --Trench.
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The Collaborative International Dictionary of English v.0.48:

Kindly \Kind"ly\, adv.
   1. Naturally; fitly. [Obs.] --Chaucer.
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            Examine how kindly the Hebrew manners of speech mix
            and incorporate with the English language --Addison.
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   2. In a kind manner; congenially; with good will; with a
      disposition to make others happy, or to oblige.
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            Be kindly affectioned one to another, with brotherly
            love.                                 --Rom. xii.
                                                  10.
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WordNet (r) 3.0 (2006):

kindly
    adv 1: in a kind manner or out of kindness; "He spoke kindly to
           the boy"; "she kindly overlooked the mistake" [ant:
           unkindly]
    adj 1: showing or motivated by sympathy and understanding and
           generosity; "was charitable in his opinions of others";
           "kindly criticism"; "a kindly act"; "sympathetic words";
           "a large-hearted mentor" [syn: charitable,
           benevolent, kindly, sympathetic, good-hearted,
           openhearted, large-hearted]
    2: pleasant and agreeable; "a kindly climate"; "kindly breeze"

Moby Thesaurus II by Grady Ward, 1.0:

110 Moby Thesaurus words for "kindly":
   Christian, Christlike, Christly, accommodating, affable, affably,
   affectionate, agreeable, agreeably, amiable, amiably, amicable,
   amicably, ardently, attentive, beneficent, benevolent, benign,
   benignant, benignantly, benignly, blissfully, breathlessly,
   brotherly, cheerfully, compassionate, complaisant, compliant,
   considerate, considerately, cooperative, cordially, courteously,
   decent, enjoyably, enthusiastically, excitedly, exuberantly, fair,
   favorable, favorably, fervently, fervidly, fraternal, friendly,
   generous, generously, genially, glowingly, good, good-hearted,
   gracious, graciously, gratifyingly, heart and soul, heartily,
   heatedly, heedfully, hospitably, human, humane, humanely, humanly,
   impassionedly, indulgent, intensely, keenly, kind, kindhearted,
   kindheartedly, kindly-disposed, loving, neighborly, nice, nicely,
   obliging, obligingly, overindulgent, overpermissive, passionately,
   permissive, pleasantly, please, pleasingly, pleasurably, politely,
   propitious, satisfyingly, sociable, softhearted, softheartedly,
   sympathetic, sympathizing, tender, tenderhearted, tenderheartedly,
   thoughtful, thoughtfully, vigorously, warm, warmhearted,
   warmheartedly, warmly, well, well-affected, well-disposed,
   well-intentioned, well-meaning, well-meant, zealously