Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 773 421
2) Placement test : grammar for beginners (lucile83) 5 983 982
3) A/AN (webmaster) 5 360 016
4) Auxiliary BE (webmaster) 3 221 719
5) Present continuous (webmaster) 2 995 921
6) Present simple (webmaster) 2 904 301
7) Present simple (webmaster) 2 594 365
8) Present continuous (webmaster) 2 427 864
9) Adjectives (webmaster) 2 091 943
10) A/an (anonyme) 2 012 430
11) Present perfect simple (webmaster) 1 637 858
12) Preterite (webmaster) 1 619 963
13) Vocabulary - Placement test (bridg) 1 617 973
14) Preterite (webmaster) 1 442 525
15) Short placement test (webmaster) 1 442 247
16) To be (bridg) 1 404 539
17) What time is it? (webmaster) 1 347 633
18) Present perfect (webmaster) 1 341 646
19) The alphabet in English (webmaster) 1 319 532
20) Adjectives (lucile83) 1 214 302
21) What time is it? (webmaster) 1 205 425
22) Numbers (webmaster) 1 187 700
23) 'A' ou 'An' (anonyme) 1 173 195
24) Two presents: present continuous, present simple (webmaster) 1 147 253
25) To be (bridg) 1 144 215
26) Comparatives / Superlatives (webmaster) 1 098 896
27) Numbers (webmaster) 1 069 238
28) CAN / MUST (webmaster) 1 057 500
29) THE/ A / AN / nothing (webmaster) 1 030 821
30) Comparatives (webmaster) 1 006 162
31) Family life (bridg) 999 396
32) Numbers > 100 (webmaster) 985 455
33) Future (going to/will/present continuous) (anonyme) 961 715
34) Plural (webmaster) 954 583
35) Superlatives (webmaster) 873 897
36) Adjectives (anonyme) 873 574
37) Simple present (bridg) 852 558
38) Spelled words N°1 (bridg) 848 960
39) Placement test beginners: Check your spelling (lucile83) 829 566
40) Introducing oneself (webmaster) 826 470
41) Adverbs of frequency (lucile83) 815 341
42) Family (bridg) 783 607
43) General test-End of high school / Beginning of university (webmaster) 781 820
44) Present simple (lucile83) 778 118
45) Frequency adverbs (webmaster) 776 817
46) Present BE + Ving (bridg) 763 653
47) Genitive (webmaster) 722 744
48) Family tree (anonyme) 718 451
49) Preterite: simple or continuous? (webmaster) 715 086
50) Passive form (lucile83) 714 024
51) Placement test (beginners) (lili73) 699 944
52) Past simple or present perfect (lucile83) 691 537
53) Future (webmaster) 675 230
54) 2 Preterites (webmaster) 660 653
55) Present perfect simple (bridg) 657 730
56) Preterite (webmaster) 618 550
57) List of 200 irregular verbs and audio (bridg) 614 904
58) Modals (webmaster) 612 019
59) Spelled words N°2 (bridg) 608 301
60) Height (webmaster) 605 710
61) Modals (webmaster) 603 306
62) Articles a / an / the (lucile83) 596 723
63) Plural forms (bridg) 576 432
64) Nationalities (webmaster) 573 502
65) Past continuous / Past simple (anonyme) 562 861
66) Irregular plurals (bridg) 552 686
67) Two presents: simple and continuous (webmaster) 548 890
68) Preterite (bridg) 548 041
69) Vocabulary: greeting people (here4u) 536 393
70) Superlatives (frapedur) 535 200
71) Give your opinion (bridg) 531 093
72) Adverbs of Frequency (bridg) 516 319
73) Present simple or continuous (lucile83) 508 289
74) Present perfect / preterite ? (anonyme) 506 730
75) Possessive case (anonyme) 479 797
76) Countries & nationalities (bridg) 472 582
77) 'The' or nothing? (webmaster) 470 659
78) Introducing oneself (easy) (webmaster) 470 226
79) Past tenses (bridg) 469 745
80) Passive voice (webmaster) 461 719
81) Present Simple vs. Past Simple (anonyme) 455 129
82) Questions : how to ask them (lucile83) 447 503
83) General Test II / End of high school / Beginning of universi (webmaster) 445 576
84) IN, ON, AT or TO? (webmaster) 444 296
85) Relative pronouns (webmaster) 443 281
86) Comparative of superiority (lucile83) 436 891
87) How to pronounce the final -ED? (past simple) (webmaster) 436 123
88) Relative clauses (webmaster) 422 555
89) Sounds: [h] (webmaster) 419 054
90) Comparative (anonyme) 412 151
91) A/an/Ø (bridg) 397 687
92) Future simple (lucile83) 395 093
93) Past simple (anonyme) 393 550
94) This / That / These / Those (webmaster) 391 978
95) Conditional (webmaster) 390 908
96) Passive voice (anonyme) 389 562
97) Comparing (webmaster) 387 586
98) Can / could/ may/ might (woodyrun) 378 722
99) Present perfect or past tense (anonyme) 375 933
100) Much, many, little and few (felin) 371 268
101) Personal pronouns (anonyme) 371 073
102) Some, any, no, enough, too/too much/too many (webmaster) 367 735
103) Preterite continuous (BE + -ING) (webmaster) 367 712
104) Genitive case (bridg) 367 166
105) Confusing words - Placement test (bridg) 364 322
106) Irregular verbs (webmaster) 362 880
107) Numbers from 1 to 10 (lucile83) 361 055
108) Past perfect simple, past perfect continuous (anonyme) 360 623
109) Present continuous or present simple (webmaster) 359 160
110) Present perfect or preterite? (anonyme) 355 184
111) Simple Past : regular verbs (anonyme) 351 814
112) Comparative Adjectives (bridg) 351 791
113) Who, Whom, Which, or Whose? (anonyme) 348 084
114) Past simple (video) (lucile83) 347 154
115) Past simple or past continuous (lucile83) 340 052
116) While / When (anonyme) 337 289
117) What time is it? (webmaster) 337 163
118) Modals (tinou) 336 050
119) Modal: may/might (lucile83) 333 752
120) Cardinal and ordinal numbers (anonyme) 328 205
121) Possessive adjectives and pronouns (woodyrun) 323 548
122) The superlative (anonyme) 323 199
123) How to talk about the weather (lili73) 320 839
124) Since and for (lucile83) 318 037
125) Flags (webmaster) 317 081
126) Irregular verbs (bridg) 315 457
127) Prepositions - in, on, at (anonyme) 313 784
128) Pronouns (woodyrun) 312 276
129) Tenses (anonyme) 311 082
130) Placement test 3 (webmaster) 310 018
131) Order of adjectives (webmaster) 306 122
132) Could/Couldn't (laure95) 305 465
133) Comparative (anonyme) 303 950
134) Adjectives and prepositions (lucile83) 303 803
135) Agreement Tags (webmaster) 303 616
136) Asking questions (webmaster) 302 679
137) Present perfect OR simple past? (bridg) 297 982
138) Questions in the past tense (lucile83) 296 981
139) Superlative Adjectives (bridg) 295 201
140) Uncountable nouns (webmaster) 295 100
141) Object pronouns (bridg) 293 866
142) Placement test 1 (lucile83) 292 258
143) Present simple (lucile83) 290 027
144) Prefer/rather (bridg) 288 805
145) Passive form (anonyme) 288 633
146) Can/Must/Should (laure95) 288 476
147) Must or Have to? (woodyrun) 286 465
148) Past perfect (lili73) 285 871
149) The/an/nothing (bridg) 284 667
150) To be (anonyme) 283 174
151) Vocabulary: asking and answering (here4u) 280 404
152) Can and can't (laure95) 279 469
153) Modal verbs (bridg) 276 939
154) Some / Any / no... (bridg) 269 919
155) Days of the week (bridg) 268 979
156) So / neither (anonyme) 264 056
157) Past simple (video) (lucile83) 263 307
158) Used to (bridg) 260 108
159) Should / must (anonyme) 258 978
160) Past tense (anonyme) 258 888
161) Vocabulary: on the phone (here4u) 258 673
162) Find out a quantity (webmaster) 258 373
163) Present continuous (chnawa) 257 979
164) Superlative + and adjective (lucile83) 256 679
165) Articles : a / an / the / Ø (anonyme) 255 038
166) Comparative and superlative (anonyme) 253 752
167) Numbers 1/100 (anonyme) 253 124
168) Modal can (video) (lucile83) 252 540
169) Relatives pronouns (who, which, that...) (anonyme) 247 775
170) Vocabulary: at the restaurant (here4u) 245 606
171) A few, a little, few, little (anonyme) 244 690
172) Comparatives (anonyme) 244 263
173) Would rather / would prefer to (anonyme) 243 975
174) Present continuous and the Going to form (anonyme) 242 195
175) Have something done (anonyme) 239 521
176) Should/ have to/ must (anonyme) 238 976
177) The past (webmaster) 237 621
178) Future continuous and future perfect. (felin) 237 311
179) Used to/would (woodyrun) 236 820
180) How to ask a question in English (bridg) 234 786
181) I wish, if only (felin) 233 820
182) Pluperfect (webmaster) 233 557
183) Countable or Uncountable? (webmaster) 232 789
184) Some / any (younes91) 231 395
185) Should / shouldn't (anonyme) 230 972
186) Present simple or continuous (bridg) 230 764
187) Adjectives - ing and ed (felin) 228 492
188) Hypothesis (webmaster) 227 705
189) Auxiliary BE (lucile83) 226 124
190) Articles a/an/the/0 (bridg) 225 925
191) Article The or nothing (anonyme) 225 559
192) Present perfect with Ever - never - (anonyme) 225 231
193) Present continuous OR Present simple? (bridg) 225 045
194) Must or mustn't (laure95) 224 277
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 543
196) To / in order to / so as to / so that (irish21) 219 385
197) Present perfect (bridg) 219 130
198) What time is it ? (anonyme) 217 353
199) Comparison (komiks) 216 572
200) Indirect speech (bridg) 215 741
