Databases for Stimulus Selection and Evaluation
General
[http://cvcl.mit.edu/SUNSeminar/ProctorVu_1999.pdf Overview of Published Norms] (From "Behavior Research Methods, Instruments, & Computers" - up to 1999)
[http://www.psychonomic.org/archive/ Searchable Archive] of the Psychonomic Society
[http://www.mrc-cbu.cam.ac.uk/people/maarten.van-casteren/mixandmatch.html "Mix and Match" Software] (for stimulus matching and pseudorandomising)
Word Recognition
[http://www.ldc.upenn.edu/Catalog/readme_files/celex.readme.html CELEX Psycholinguistic Database] (orthographic, phonetic and lexical information on English/German/Dutch words)
[http://www.psych.rl.ac.uk/ MRC Psycholinguistic Database], (orth/phon/lex information on English words, plus imageability ratings; direct access to search engine [http://www.psy.uwa.edu.au/mrcdatabase/uwa_mrc.htm here)
[http://language.psy.bris.ac.uk/bristol_norms.html Bristol Norms] (Age-of-acquisition, imageability and familiarity)
[http://elexicon.wustl.edu/ English Lexicon Project] (orth/phon/lex information on English words, plus Lexical Decision and Reading Latencies, HAL Frequencies etc.)
[http://www.natcorp.ox.ac.uk/ British National Corpus] (English words and phrases)
[http://wordsmith.org/ Wordsmith] (anagrams, dictionary etc.)
[http://wordnet.princeton.edu/ Princeton WordNet] (Conceptual-semantic networks)
[http://www.eat.rl.ac.uk/ Edinburgh Word Association Thesaurus] (empirical semantic word association data)
[http://www.ncbi.nlm.nih.gov/pubmed/20805588 Sentence Cloze Probability Norms] (for 498 sentences)
[http://lsa.colorado.edu/ Latent Semantic Analysis] (for analysing and comparing texts and documents; more [http://www.scholarpedia.org/article/Latent_semantic_analysis here])
[http://csea.phhp.ufl.edu/media/anewmessage.html Affective Norms for English Words]
[http://csea.phhp.ufl.edu/media/anetmessage.html Affective Norms for English Text]
Picture Naming
[http://www.ncbi.nlm.nih.gov/pubmed/7373248 Snodgrass&Vanderwart Original], and [http://www.ingentaconnect.com/content/psych/jcen/2003/00000025/00000004/art00008 Snodgrass&Vanderwart revisited] (visual, semantic and phonological information on line drawings)
[http://crl.ucsd.edu/~aszekely/ipnp/ The International Picture Naming Project] (norms for picture naming in 7 different languages, plus some norms for reading and repetition)
[http://amdrae.ssc.uwo.ca/McRaeLab/norms.php McRae's Semantic Feature Norms] (norms for living and nonliving basic-level concepts, see [http://amdrae.ssc.uwo.ca/McRaeLab/articles/McRae_etal_norms_BRM_05.pdf Paper])
Emotion Research
[http://csea.phhp.ufl.edu/media/iapsmessage.html International Affective Picture System (IAPS)] (normative ratings of emotion (pleasure, arousal, dominance) for a set of color photographs)
[http://csea.phhp.ufl.edu/media/iadsmessage.html International Affective Digital Sounds (IADS)]
[http://csea.phhp.ufl.edu/media/anewmessage.html Affective Norms for English Words (ANEW)]
[http://csea.phhp.ufl.edu/media/anetmessage.html Affective Norms for English Text (ANET)]