Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 775 544
2) Placement test : grammar for beginners (lucile83) 5 987 193
3) A/AN (webmaster) 5 362 241
4) Auxiliary BE (webmaster) 3 222 796
5) Present continuous (webmaster) 2 997 446
6) Present simple (webmaster) 2 908 555
7) Present simple (webmaster) 2 595 732
8) Present continuous (webmaster) 2 430 808
9) Adjectives (webmaster) 2 092 675
10) A/an (anonyme) 2 013 660
11) Present perfect simple (webmaster) 1 640 067
12) Preterite (webmaster) 1 623 425
13) Vocabulary - Placement test (bridg) 1 618 481
14) Preterite (webmaster) 1 444 670
15) Short placement test (webmaster) 1 442 841
16) To be (bridg) 1 405 292
17) What time is it? (webmaster) 1 348 301
18) Present perfect (webmaster) 1 343 555
19) The alphabet in English (webmaster) 1 320 209
20) Adjectives (lucile83) 1 215 051
21) What time is it? (webmaster) 1 206 604
22) Numbers (webmaster) 1 188 095
23) 'A' ou 'An' (anonyme) 1 174 240
24) Two presents: present continuous, present simple (webmaster) 1 148 264
25) To be (bridg) 1 144 801
26) Comparatives / Superlatives (webmaster) 1 101 013
27) Numbers (webmaster) 1 069 883
28) CAN / MUST (webmaster) 1 057 944
29) THE/ A / AN / nothing (webmaster) 1 032 160
30) Comparatives (webmaster) 1 006 613
31) Family life (bridg) 1 000 036
32) Numbers > 100 (webmaster) 985 897
33) Future (going to/will/present continuous) (anonyme) 962 476
34) Plural (webmaster) 955 115
35) Superlatives (webmaster) 874 366
36) Adjectives (anonyme) 874 130
37) Simple present (bridg) 853 117
38) Spelled words N°1 (bridg) 849 548
39) Placement test beginners: Check your spelling (lucile83) 829 772
40) Introducing oneself (webmaster) 826 794
41) Adverbs of frequency (lucile83) 816 223
42) Family (bridg) 784 099
43) General test-End of high school / Beginning of university (webmaster) 782 191
44) Present simple (lucile83) 778 987
45) Frequency adverbs (webmaster) 777 296
46) Present BE + Ving (bridg) 764 370
47) Genitive (webmaster) 723 094
48) Family tree (anonyme) 718 932
49) Passive form (lucile83) 717 331
50) Preterite: simple or continuous? (webmaster) 715 699
51) Placement test (beginners) (lili73) 700 401
52) Past simple or present perfect (lucile83) 692 614
53) Future (webmaster) 675 484
54) 2 Preterites (webmaster) 661 209
55) Present perfect simple (bridg) 659 072
56) Preterite (webmaster) 619 454
57) List of 200 irregular verbs and audio (bridg) 615 445
58) Modals (webmaster) 612 338
59) Spelled words N°2 (bridg) 608 725
60) Height (webmaster) 606 022
61) Modals (webmaster) 604 221
62) Articles a / an / the (lucile83) 596 740
63) Plural forms (bridg) 576 864
64) Nationalities (webmaster) 573 839
65) Past continuous / Past simple (anonyme) 564 600
66) Irregular plurals (bridg) 553 101
67) Two presents: simple and continuous (webmaster) 549 125
68) Preterite (bridg) 548 408
69) Superlatives (frapedur) 536 700
70) Vocabulary: greeting people (here4u) 536 436
71) Give your opinion (bridg) 531 495
72) Adverbs of Frequency (bridg) 516 593
73) Present simple or continuous (lucile83) 509 450
74) Present perfect / preterite ? (anonyme) 507 823
75) Possessive case (anonyme) 480 193
76) Countries & nationalities (bridg) 472 952
77) 'The' or nothing? (webmaster) 470 952
78) Introducing oneself (easy) (webmaster) 470 439
79) Past tenses (bridg) 470 180
80) Passive voice (webmaster) 462 295
81) Present Simple vs. Past Simple (anonyme) 455 856
82) Questions : how to ask them (lucile83) 447 849
83) General Test II / End of high school / Beginning of universi (webmaster) 445 836
84) IN, ON, AT or TO? (webmaster) 444 611
85) Relative pronouns (webmaster) 443 748
86) Comparative of superiority (lucile83) 437 565
87) How to pronounce the final -ED? (past simple) (webmaster) 436 742
88) Relative clauses (webmaster) 422 892
89) Sounds: [h] (webmaster) 419 264
90) Comparative (anonyme) 412 763
91) A/an/Ø (bridg) 398 218
92) Future simple (lucile83) 395 678
93) Past simple (anonyme) 395 226
94) This / That / These / Those (webmaster) 392 220
95) Conditional (webmaster) 391 218
96) Passive voice (anonyme) 389 935
97) Comparing (webmaster) 387 750
98) Can / could/ may/ might (woodyrun) 378 991
99) Present perfect or past tense (anonyme) 376 490
100) Much, many, little and few (felin) 371 901
101) Personal pronouns (anonyme) 371 169
102) Preterite continuous (BE + -ING) (webmaster) 368 299
103) Some, any, no, enough, too/too much/too many (webmaster) 367 883
104) Genitive case (bridg) 367 489
105) Confusing words - Placement test (bridg) 364 404
106) Irregular verbs (webmaster) 363 162
107) Numbers from 1 to 10 (lucile83) 361 266
108) Past perfect simple, past perfect continuous (anonyme) 360 705
109) Present continuous or present simple (webmaster) 359 333
110) Present perfect or preterite? (anonyme) 355 947
111) Simple Past : regular verbs (anonyme) 352 219
112) Comparative Adjectives (bridg) 351 945
113) Who, Whom, Which, or Whose? (anonyme) 348 388
114) Past simple (video) (lucile83) 347 704
115) Past simple or past continuous (lucile83) 341 043
116) While / When (anonyme) 337 892
117) What time is it? (webmaster) 337 445
118) Modals (tinou) 336 262
119) Modal: may/might (lucile83) 333 913
120) Cardinal and ordinal numbers (anonyme) 328 465
121) The superlative (anonyme) 324 102
122) Possessive adjectives and pronouns (woodyrun) 323 833
123) How to talk about the weather (lili73) 320 853
124) Since and for (lucile83) 318 303
125) Flags (webmaster) 317 281
126) Irregular verbs (bridg) 315 664
127) Prepositions - in, on, at (anonyme) 313 904
128) Pronouns (woodyrun) 312 868
129) Tenses (anonyme) 311 517
130) Placement test 3 (webmaster) 310 190
131) Order of adjectives (webmaster) 306 337
132) Could/Couldn't (laure95) 305 602
133) Comparative (anonyme) 304 126
134) Adjectives and prepositions (lucile83) 303 882
135) Agreement Tags (webmaster) 303 818
136) Asking questions (webmaster) 302 853
137) Present perfect OR simple past? (bridg) 298 114
138) Questions in the past tense (lucile83) 297 151
139) Superlative Adjectives (bridg) 295 494
140) Uncountable nouns (webmaster) 295 343
141) Object pronouns (bridg) 294 335
142) Placement test 1 (lucile83) 292 473
143) Present simple (lucile83) 290 531
144) Passive form (anonyme) 289 610
145) Prefer/rather (bridg) 289 039
146) Can/Must/Should (laure95) 288 665
147) Past perfect (lili73) 286 838
148) Must or Have to? (woodyrun) 286 759
149) The/an/nothing (bridg) 284 880
150) To be (anonyme) 283 318
151) Vocabulary: asking and answering (here4u) 280 422
152) Can and can't (laure95) 280 139
153) Modal verbs (bridg) 277 069
154) Some / Any / no... (bridg) 270 118
155) Days of the week (bridg) 269 030
156) So / neither (anonyme) 264 206
157) Past simple (video) (lucile83) 263 485
158) Used to (bridg) 260 210
159) Should / must (anonyme) 259 184
160) Past tense (anonyme) 259 077
161) Present continuous (chnawa) 259 038
162) Vocabulary: on the phone (here4u) 258 698
163) Find out a quantity (webmaster) 258 435
164) Superlative + and adjective (lucile83) 256 947
165) Articles : a / an / the / Ø (anonyme) 255 742
166) Comparative and superlative (anonyme) 254 347
167) Numbers 1/100 (anonyme) 253 306
168) Modal can (video) (lucile83) 252 673
169) Relatives pronouns (who, which, that...) (anonyme) 247 796
170) Comparatives (anonyme) 245 903
171) Vocabulary: at the restaurant (here4u) 245 632
172) A few, a little, few, little (anonyme) 244 912
173) Would rather / would prefer to (anonyme) 244 109
174) Present continuous and the Going to form (anonyme) 242 316
175) Have something done (anonyme) 239 631
176) Should/ have to/ must (anonyme) 239 531
177) The past (webmaster) 237 695
178) Future continuous and future perfect. (felin) 237 394
179) Used to/would (woodyrun) 237 180
180) How to ask a question in English (bridg) 235 001
181) I wish, if only (felin) 233 914
182) Pluperfect (webmaster) 233 668
183) Countable or Uncountable? (webmaster) 232 933
184) Some / any (younes91) 232 041
185) Should / shouldn't (anonyme) 231 131
186) Present simple or continuous (bridg) 230 766
187) Adjectives - ing and ed (felin) 228 645
188) Hypothesis (webmaster) 227 859
189) Auxiliary BE (lucile83) 226 235
190) Articles a/an/the/0 (bridg) 226 063
191) Article The or nothing (anonyme) 225 749
192) Present perfect with Ever - never - (anonyme) 225 336
193) Present continuous OR Present simple? (bridg) 225 208
194) Must or mustn't (laure95) 224 757
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 651
196) To / in order to / so as to / so that (irish21) 219 646
197) Present perfect (bridg) 219 322
198) What time is it ? (anonyme) 217 448
199) Comparison (komiks) 217 272
200) Indirect speech (bridg) 216 005
