The Wikipedia article Manifesto has a long list of notable manifestos.
Literary theorist Greg Ulmer came up with a brief list of rhetorical features of manifestos, according to which Plato's Phaedrus and Descartes's Discourse on Method are also manifestos by virtue of inventing a new practice based on opposition to an old practice, analogy with a basically unrelated practice, and application of some body of theory. posted by Monsieur Caution at 2:55 PM on November 7, 2012
The FLQ Manifesto was a key document of the group the Front de libération du Québec. On 8 October 1970, during the October Crisis, it was broadcast by CBC/Radio-Canada television as one of many demands required for the release of kidnapped British Trade Commissioner James Cross.
The reading of the text, slangy and radical, on the normally staid CBC was a big deal, not just for the obvious reason of kidnapping and murder, but for Québec French to be broadcast rather than uptight French French. posted by looli at 2:56 PM on November 7, 2012 [1 favorite]
Oh man, one time Arthur Danto told me about a grad student he knew that was doing her dissertation on art manifestos - she had 150+ collected. I wish I could find that dissertation, but no such google luck. The point is, there are tons.
Dunno how influential it was, but I love it: Donna Haraway's Cyborg Manifesto. The last line is one of my favorite things I read in college ever. posted by ifjuly at 8:20 PM on November 7, 2012
Roxy Music performs the title track from their sixth LP, Manifesto, in Manchester 1979. The band (if not this song) was certainly influential, although at that late date, not so much. posted by Rash at 11:21 PM on November 7, 2012
Dada manifesto
Surrealist manifesto
posted by mediated self at 2:39 PM on November 7, 2012 [2 favorites]