Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 771 784
2) Placement test : grammar for beginners (lucile83) 5 980 871
3) A/AN (webmaster) 5 358 105
4) Auxiliary BE (webmaster) 3 220 833
5) Present continuous (webmaster) 2 994 579
6) Present simple (webmaster) 2 900 202
7) Present simple (webmaster) 2 593 262
8) Present continuous (webmaster) 2 425 136
9) Adjectives (webmaster) 2 091 414
10) A/an (anonyme) 2 011 433
11) Present perfect simple (webmaster) 1 635 952
12) Vocabulary - Placement test (bridg) 1 617 451
13) Preterite (webmaster) 1 616 821
14) Short placement test (webmaster) 1 441 834
15) Preterite (webmaster) 1 440 581
16) To be (bridg) 1 403 810
17) What time is it? (webmaster) 1 346 935
18) Present perfect (webmaster) 1 339 704
19) The alphabet in English (webmaster) 1 319 020
20) Adjectives (lucile83) 1 213 704
21) What time is it? (webmaster) 1 204 548
22) Numbers (webmaster) 1 187 360
23) 'A' ou 'An' (anonyme) 1 172 367
24) Two presents: present continuous, present simple (webmaster) 1 146 373
25) To be (bridg) 1 143 700
26) Comparatives / Superlatives (webmaster) 1 096 899
27) Numbers (webmaster) 1 068 723
28) CAN / MUST (webmaster) 1 057 154
29) THE/ A / AN / nothing (webmaster) 1 029 748
30) Comparatives (webmaster) 1 005 834
31) Family life (bridg) 998 959
32) Numbers > 100 (webmaster) 985 117
33) Future (going to/will/present continuous) (anonyme) 961 053
34) Plural (webmaster) 954 162
35) Superlatives (webmaster) 873 509
36) Adjectives (anonyme) 873 119
37) Simple present (bridg) 852 035
38) Spelled words N°1 (bridg) 848 559
39) Placement test beginners: Check your spelling (lucile83) 829 380
40) Introducing oneself (webmaster) 826 200
41) Adverbs of frequency (lucile83) 814 573
42) Family (bridg) 783 243
43) General test-End of high school / Beginning of university (webmaster) 781 178
44) Present simple (lucile83) 777 142
45) Frequency adverbs (webmaster) 776 509
46) Present BE + Ving (bridg) 763 094
47) Genitive (webmaster) 722 398
48) Family tree (anonyme) 718 109
49) Preterite: simple or continuous? (webmaster) 714 592
50) Passive form (lucile83) 711 272
51) Placement test (beginners) (lili73) 699 510
52) Past simple or present perfect (lucile83) 690 610
53) Future (webmaster) 674 926
54) 2 Preterites (webmaster) 660 122
55) Present perfect simple (bridg) 656 551
56) Preterite (webmaster) 617 753
57) List of 200 irregular verbs and audio (bridg) 614 496
58) Modals (webmaster) 611 801
59) Spelled words N°2 (bridg) 607 987
60) Height (webmaster) 605 518
61) Modals (webmaster) 602 441
62) Articles a / an / the (lucile83) 596 704
63) Plural forms (bridg) 576 077
64) Nationalities (webmaster) 573 223
65) Past continuous / Past simple (anonyme) 561 343
66) Irregular plurals (bridg) 552 354
67) Two presents: simple and continuous (webmaster) 548 493
68) Preterite (bridg) 547 719
69) Vocabulary: greeting people (here4u) 536 369
70) Superlatives (frapedur) 534 228
71) Give your opinion (bridg) 530 772
72) Adverbs of Frequency (bridg) 516 072
73) Present simple or continuous (lucile83) 506 980
74) Present perfect / preterite ? (anonyme) 505 716
75) Possessive case (anonyme) 479 583
76) Countries & nationalities (bridg) 472 184
77) 'The' or nothing? (webmaster) 470 429
78) Introducing oneself (easy) (webmaster) 470 053
79) Past tenses (bridg) 469 301
80) Passive voice (webmaster) 461 243
81) Present Simple vs. Past Simple (anonyme) 454 050
82) Questions : how to ask them (lucile83) 447 197
83) General Test II / End of high school / Beginning of universi (webmaster) 445 399
84) IN, ON, AT or TO? (webmaster) 443 967
85) Relative pronouns (webmaster) 442 946
86) Comparative of superiority (lucile83) 436 352
87) How to pronounce the final -ED? (past simple) (webmaster) 435 522
88) Relative clauses (webmaster) 422 333
89) Sounds: [h] (webmaster) 418 886
90) Comparative (anonyme) 411 512
91) A/an/Ø (bridg) 397 230
92) Future simple (lucile83) 394 762
93) Past simple (anonyme) 392 181
94) This / That / These / Those (webmaster) 391 782
95) Conditional (webmaster) 390 608
96) Passive voice (anonyme) 389 296
97) Comparing (webmaster) 387 441
98) Can / could/ may/ might (woodyrun) 378 385
99) Present perfect or past tense (anonyme) 375 413
100) Personal pronouns (anonyme) 370 973
101) Much, many, little and few (felin) 370 571
102) Some, any, no, enough, too/too much/too many (webmaster) 367 588
103) Preterite continuous (BE + -ING) (webmaster) 367 208
104) Genitive case (bridg) 366 709
105) Confusing words - Placement test (bridg) 364 237
106) Irregular verbs (webmaster) 362 693
107) Numbers from 1 to 10 (lucile83) 360 898
108) Past perfect simple, past perfect continuous (anonyme) 360 486
109) Present continuous or present simple (webmaster) 359 007
110) Present perfect or preterite? (anonyme) 354 531
111) Comparative Adjectives (bridg) 351 649
112) Simple Past : regular verbs (anonyme) 351 502
113) Who, Whom, Which, or Whose? (anonyme) 347 862
114) Past simple (video) (lucile83) 346 794
115) Past simple or past continuous (lucile83) 339 153
116) What time is it? (webmaster) 337 009
117) While / When (anonyme) 336 356
118) Modals (tinou) 335 860
119) Modal: may/might (lucile83) 333 563
120) Cardinal and ordinal numbers (anonyme) 327 956
121) Possessive adjectives and pronouns (woodyrun) 323 302
122) The superlative (anonyme) 322 641
123) How to talk about the weather (lili73) 320 816
124) Since and for (lucile83) 317 802
125) Flags (webmaster) 316 928
126) Irregular verbs (bridg) 315 285
127) Prepositions - in, on, at (anonyme) 313 672
128) Pronouns (woodyrun) 311 564
129) Tenses (anonyme) 310 638
130) Placement test 3 (webmaster) 309 907
131) Order of adjectives (webmaster) 305 850
132) Could/Couldn't (laure95) 305 319
133) Comparative (anonyme) 303 784
134) Adjectives and prepositions (lucile83) 303 715
135) Agreement Tags (webmaster) 303 464
136) Asking questions (webmaster) 302 435
137) Present perfect OR simple past? (bridg) 297 854
138) Questions in the past tense (lucile83) 296 728
139) Superlative Adjectives (bridg) 295 004
140) Uncountable nouns (webmaster) 294 906
141) Object pronouns (bridg) 293 579
142) Placement test 1 (lucile83) 291 974
143) Present simple (lucile83) 289 650
144) Prefer/rather (bridg) 288 605
145) Can/Must/Should (laure95) 288 185
146) Passive form (anonyme) 287 831
147) Must or Have to? (woodyrun) 286 170
148) Past perfect (lili73) 285 023
149) The/an/nothing (bridg) 284 495
150) To be (anonyme) 283 060
151) Vocabulary: asking and answering (here4u) 280 384
152) Can and can't (laure95) 278 999
153) Modal verbs (bridg) 276 832
154) Some / Any / no... (bridg) 269 699
155) Days of the week (bridg) 268 945
156) So / neither (anonyme) 263 917
157) Past simple (video) (lucile83) 263 192
158) Used to (bridg) 260 041
159) Past tense (anonyme) 258 755
160) Should / must (anonyme) 258 710
161) Vocabulary: on the phone (here4u) 258 651
162) Find out a quantity (webmaster) 258 321
163) Present continuous (chnawa) 256 935
164) Superlative + and adjective (lucile83) 256 434
165) Articles : a / an / the / Ø (anonyme) 254 262
166) Comparative and superlative (anonyme) 253 154
167) Numbers 1/100 (anonyme) 252 949
168) Modal can (video) (lucile83) 252 453
169) Relatives pronouns (who, which, that...) (anonyme) 247 730
170) Vocabulary: at the restaurant (here4u) 245 588
171) A few, a little, few, little (anonyme) 244 366
172) Would rather / would prefer to (anonyme) 243 867
173) Comparatives (anonyme) 243 158
174) Present continuous and the Going to form (anonyme) 242 066
175) Have something done (anonyme) 239 374
176) Should/ have to/ must (anonyme) 238 709
177) The past (webmaster) 237 533
178) Future continuous and future perfect. (felin) 237 187
179) Used to/would (woodyrun) 236 515
180) How to ask a question in English (bridg) 234 328
181) I wish, if only (felin) 233 742
182) Pluperfect (webmaster) 233 416
183) Countable or Uncountable? (webmaster) 232 655
184) Some / any (younes91) 230 925
185) Should / shouldn't (anonyme) 230 817
186) Present simple or continuous (bridg) 230 746
187) Adjectives - ing and ed (felin) 228 365
188) Hypothesis (webmaster) 227 505
189) Auxiliary BE (lucile83) 226 059
190) Articles a/an/the/0 (bridg) 225 854
191) Article The or nothing (anonyme) 225 457
192) Present perfect with Ever - never - (anonyme) 225 124
193) Present continuous OR Present simple? (bridg) 224 919
194) Must or mustn't (laure95) 223 907
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 443
196) To / in order to / so as to / so that (irish21) 219 160
197) Present perfect (bridg) 219 032
198) What time is it ? (anonyme) 217 275
199) Comparison (komiks) 215 476
200) Indirect speech (bridg) 215 473
