Writing

http://scc.losrios.edu/~langlit/esl/links/writinglinks.html
http://tinyurl.com/2yrz9
http://leo.stcloudstate.edu/style/wordiness.html
http://mit.imoat.net/handbook/wordines.htm
http://owl.english.purdue.edu/
http://staff.jccc.net/pmcqueen/Tips/wordiness.htm
http://web.uvic.ca/~gkblank/wordiness.html
http://www.bristol.mass.edu/Department_Pages/Quest_Writing_Lab/grammar/wordines.htm
http://www.bulzeye.co.nz/wordiness_ddf.htm
http://www.class.uidaho.edu/adv_tech_wrt/resources/sentence_style/Wordiness.htm
http://www.howewriteyouare.com/articles/eliminatewordiness_0203.html
http://esl.about.com/cs/onthejobenglish/a/a_basbletter.htm
http://esl.about.com/library/howto/htbusiness.htm
http://jobsearchtech.about.com/library/bl-business-letters.htm
http://owl.english.purdue.edu/handouts/pw/p_basicbusletter.html
http://www.bkkonline.com/business/
http://www.business-letter-writing.com/writing-a-business-letter-examples/7Cs-of-business-letter-writing.html
http://www.io.com/~hcexres/tcm1603/acchtml/genlett.html
http://www.parapal-online.co.uk/letters.html
http://www.wisc.edu/writing/Handbook/BusinessLetter.html

Plain English:
http://home.comcast.net/~garbl/writing/concise.htm
http://www.askoxford.com/betterwriting/plainenglish/
http://www.plainenglish.co.uk/
http://www.plainlanguage.gov/
http://www.parapal-online.co.uk/exercises/multichoice.swf?address=general//form_m
http://www.englishclub.com/esl-forums/index.php
http://www.englishforum.com/00/students/
http://www.eslcafe.com/forums/student/
http://www.usingenglish.com/forum/

Written Comprehension:
http://www.ifglangues.fr/test/english.htm
http://www.lcc.gatech.edu/regents/scoremanual.html
http://www.phon.ucl.ac.uk/home/dick/feg/essays.htm
http://www.takesat.com/writing.php