OK, this is a big one. I'll only do the ones which have had a sizable amount of work put into them: a lot of my languages are begun and then scrapped (I'm sure many of you are like that).
Frislandian: it started out looking an awful lot like Finnish phonologically, however since the revision it is now a bit more like a Western European language like Icelandic, though there are still some weirdnesses such as prenasalised instead of voiced stops, and phonotactics with extremely tight restrictions on initial and final consonants. Over the course of the revision the language has also shifted from an almost entirely suffixing language to one with a few more prefixes (namely Ergative and Oblique marking), a system of theme-markers bearing a resemblance to the ones in PIE (though marking different things) and one or two of the cases have been dropped.
Kaita: this is phonologically Proto-Arapaho-Atsina with Wichita vowels and some intriguing vowel-glide merging. Grammatically it does more of its own thing, and could be said to be a good deal more Iroquoian than Algonquian.
Proto-Muyan: it's a weird one. I wanted a labialless language (I like those), and I wanted to do retroflexes and palatals and only one liquid /l/. When I revised it it gained aspiration, but didn't change very much otherwise. This gives it a bit of an Indo-Aryan feel. the vowels, on the other hand, are a bit like Big Nambas, only there is a length distinction in the front vowels as well. Grammatically it's a bit of hodgepodge, though it is heavily prefixing (even case is attached to the front of a noun) and uses classifiers for numerals and demonstratives. Actually, thinking about it now it might actually come closest to Munda.
Aikuu: well this is probably even weirder than Proto-Muyan. The phonology looks most like Pirahã minus labials and voiced stops, plus another fricative, plus a nasal and a rhotic, with a high-back-unrounded instead of a mid-back-rounded vowel. The grammar is something else entirely: a hierarchically-based agreement with one SAP; verbs which are maximally bi-valent and cannot take obliques; large numbers of serial verbs to make up for the shortfall; marked nominative, with a nominative noun inside a set of serial verbs marking a change of subject to that noun; and some irregular and suppletive imperatives.
Kokanãi: with this I wanted a phonology that looked a bit like Malagasy, but was different enough and "alien" enough to make it feel more like my own. To this end I removed the plain voiced and voiceless prenasalised stops, the voiced fricatives, the labial fricative /f/, /h/, the voiceless trilled affricate, nasals (as separate from prenasalised stops), /l/, changed the alveolar affricates to palatal ones and added the glides /w/ and /j/ and a glottal stop. I also lowered Malagasy's rounded vowel to /o/, and added a three way distinction between short, long and nasal vowels. Inadvertently, the result looks rather Tupian. The grammar bears some resemblances, with an "Austronesian" style voice system, though I've added a reflexive and each verb is inherently either Agent-trigger or Patient-trigger. The verbs also agree with the trigger and one of the "oblique" arguments (actually usually the agent) and there's verbal compounding and noun-incoporation. However, there is also a large number of particles with meanings varying from grammatical (e.g. negative, polar interrogative) to pragmatic(e.g. a particle which indicates the speaker's lower social status relative to the listener) and the determiner system is really something to behold.
I also have an unnamed language which looks like an Australian language minus the retroflexes and the laterals and plus the bilabial trill; Sóttem, a language which blends Ainu and Austronesian (e.g. both a pitch-accent and the velar nasal) while having a few other weird features (e.g. word-initial geminates), tripartite alignment, a ridiculous number of moods which includes a few evidentials, some formality distinctions and more incorporation; and a language I might do up some day and post as a collaborative language-family project called Iri-una, which is my take on Ryukyuan, though the phonology is even more reduced than Oogami.