Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 777 593
2) Placement test : grammar for beginners (anonyme) 5 990 338
3) A/AN (webmaster) 5 364 327
4) Auxiliary BE (webmaster) 3 223 865
5) Present continuous (webmaster) 2 998 687
6) Present simple (webmaster) 2 913 101
7) Present simple (webmaster) 2 597 064
8) Present continuous (webmaster) 2 433 587
9) Adjectives (webmaster) 2 093 272
10) A/an (anonyme) 2 014 907
11) Present perfect simple (webmaster) 1 642 631
12) Preterite (webmaster) 1 627 152
13) Vocabulary - Placement test (bridg) 1 619 002
14) Preterite (webmaster) 1 446 807
15) Short placement test (webmaster) 1 443 376
16) To be (bridg) 1 405 984
17) What time is it? (webmaster) 1 349 134
18) Present perfect (webmaster) 1 345 465
19) The alphabet in English (webmaster) 1 320 832
20) Adjectives (anonyme) 1 215 650
21) What time is it? (webmaster) 1 207 902
22) Numbers (webmaster) 1 188 447
23) 'A' ou 'An' (anonyme) 1 175 194
24) Two presents: present continuous, present simple (webmaster) 1 149 038
25) To be (bridg) 1 145 335
26) Comparatives / Superlatives (webmaster) 1 103 415
27) Numbers (webmaster) 1 070 596
28) CAN / MUST (webmaster) 1 058 426
29) THE/ A / AN / nothing (webmaster) 1 033 277
30) Comparatives (webmaster) 1 007 047
31) Family life (bridg) 1 000 641
32) Numbers > 100 (webmaster) 986 202
33) Future (going to/will/present continuous) (anonyme) 963 696
34) Plural (webmaster) 955 603
35) Superlatives (webmaster) 875 047
36) Adjectives (anonyme) 874 624
37) Simple present (bridg) 853 792
38) Spelled words N°1 (bridg) 849 994
39) Placement test beginners: Check your spelling (anonyme) 829 989
40) Introducing oneself (webmaster) 827 087
41) Adverbs of frequency (anonyme) 817 117
42) Family (bridg) 784 625
43) General test-End of high school / Beginning of university (webmaster) 782 651
44) Present simple (anonyme) 780 033
45) Frequency adverbs (webmaster) 777 639
46) Present BE + Ving (bridg) 764 939
47) Genitive (webmaster) 723 479
48) Passive form (anonyme) 720 791
49) Family tree (anonyme) 719 270
50) Preterite: simple or continuous? (webmaster) 716 419
51) Placement test (beginners) (lili73) 700 869
52) Past simple or present perfect (anonyme) 693 647
53) Future (webmaster) 675 805
54) 2 Preterites (webmaster) 661 845
55) Present perfect simple (bridg) 660 513
56) Preterite (webmaster) 620 183
57) List of 200 irregular verbs and audio (bridg) 615 916
58) Modals (webmaster) 612 609
59) Spelled words N°2 (bridg) 609 062
60) Height (webmaster) 606 244
61) Modals (webmaster) 605 141
62) Articles a / an / the (anonyme) 596 758
63) Plural forms (bridg) 577 323
64) Nationalities (webmaster) 574 142
65) Past continuous / Past simple (anonyme) 565 921
66) Irregular plurals (bridg) 553 504
67) Two presents: simple and continuous (webmaster) 549 487
68) Preterite (bridg) 548 877
69) Superlatives (frapedur) 538 311
70) Vocabulary: greeting people (here4u) 536 458
71) Give your opinion (bridg) 531 848
72) Adverbs of Frequency (bridg) 516 853
73) Present simple or continuous (anonyme) 510 629
74) Present perfect / preterite ? (anonyme) 509 149
75) Possessive case (anonyme) 480 523
76) Countries & nationalities (bridg) 473 344
77) 'The' or nothing? (webmaster) 471 167
78) Past tenses (bridg) 470 670
79) Introducing oneself (easy) (webmaster) 470 660
80) Passive voice (webmaster) 463 151
81) Present Simple vs. Past Simple (anonyme) 456 810
82) Questions : how to ask them (anonyme) 448 258
83) General Test II / End of high school / Beginning of universi (webmaster) 446 087
84) IN, ON, AT or TO? (webmaster) 444 988
85) Relative pronouns (webmaster) 444 241
86) Comparative of superiority (anonyme) 438 390
87) How to pronounce the final -ED? (past simple) (webmaster) 437 502
88) Relative clauses (webmaster) 423 159
89) Sounds: [h] (webmaster) 419 456
90) Comparative (anonyme) 413 428
91) A/an/Ø (bridg) 398 634
92) Past simple (anonyme) 396 720
93) Future simple (anonyme) 396 227
94) This / That / These / Those (webmaster) 392 463
95) Conditional (webmaster) 391 536
96) Passive voice (anonyme) 390 343
97) Comparing (webmaster) 387 949
98) Can / could/ may/ might (woodyrun) 379 353
99) Present perfect or past tense (anonyme) 377 159
100) Much, many, little and few (felin) 372 564
101) Personal pronouns (anonyme) 371 262
102) Preterite continuous (BE + -ING) (webmaster) 368 969
103) Some, any, no, enough, too/too much/too many (webmaster) 368 033
104) Genitive case (bridg) 367 887
105) Confusing words - Placement test (bridg) 364 503
106) Irregular verbs (webmaster) 363 497
107) Numbers from 1 to 10 (anonyme) 361 468
108) Past perfect simple, past perfect continuous (anonyme) 360 851
109) Present continuous or present simple (webmaster) 359 500
110) Present perfect or preterite? (anonyme) 356 541
111) Simple Past : regular verbs (anonyme) 352 800
112) Comparative Adjectives (bridg) 352 144
113) Who, Whom, Which, or Whose? (anonyme) 348 691
114) Past simple (video) (anonyme) 348 242
115) Past simple or past continuous (anonyme) 342 287
116) While / When (anonyme) 338 423
117) What time is it? (webmaster) 337 739
118) Modals (tinou) 336 464
119) Modal: may/might (anonyme) 334 107
120) Cardinal and ordinal numbers (anonyme) 328 658
121) The superlative (anonyme) 325 082
122) Possessive adjectives and pronouns (woodyrun) 324 069
123) How to talk about the weather (lili73) 320 874
124) Since and for (anonyme) 318 673
125) Flags (webmaster) 317 488
126) Irregular verbs (bridg) 315 915
127) Prepositions - in, on, at (anonyme) 314 058
128) Pronouns (woodyrun) 313 473
129) Tenses (anonyme) 311 790
130) Placement test 3 (webmaster) 310 360
131) Order of adjectives (webmaster) 306 511
132) Could/Couldn't (laure95) 305 735
133) Comparative (anonyme) 304 438
134) Adjectives and prepositions (anonyme) 303 978
135) Agreement Tags (webmaster) 303 966
136) Asking questions (webmaster) 303 019
137) Present perfect OR simple past? (bridg) 298 293
138) Questions in the past tense (anonyme) 297 451
139) Superlative Adjectives (bridg) 295 706
140) Uncountable nouns (webmaster) 295 545
141) Object pronouns (bridg) 294 750
142) Placement test 1 (anonyme) 292 689
143) Present simple (anonyme) 291 094
144) Passive form (anonyme) 290 739
145) Prefer/rather (bridg) 289 279
146) Can/Must/Should (laure95) 289 040
147) Past perfect (lili73) 287 760
148) Must or Have to? (woodyrun) 287 246
149) The/an/nothing (bridg) 285 149
150) To be (anonyme) 283 441
151) Can and can't (laure95) 281 269
152) Vocabulary: asking and answering (here4u) 280 440
153) Modal verbs (bridg) 277 198
154) Some / Any / no... (bridg) 270 370
155) Days of the week (bridg) 269 096
156) So / neither (anonyme) 264 289
157) Past simple (video) (anonyme) 263 642
158) Used to (bridg) 260 338
159) Present continuous (chnawa) 259 746
160) Should / must (anonyme) 259 492
161) Past tense (anonyme) 259 240
162) Vocabulary: on the phone (here4u) 258 720
163) Find out a quantity (webmaster) 258 512
164) Superlative + and adjective (anonyme) 257 107
165) Articles : a / an / the / Ø (anonyme) 256 600
166) Comparative and superlative (anonyme) 254 985
167) Numbers 1/100 (anonyme) 253 589
168) Modal can (video) (anonyme) 252 920
169) Relatives pronouns (who, which, that...) (anonyme) 247 827
170) Comparatives (anonyme) 247 531
171) Vocabulary: at the restaurant (here4u) 245 650
172) A few, a little, few, little (anonyme) 245 178
173) Would rather / would prefer to (anonyme) 244 201
174) Present continuous and the Going to form (anonyme) 242 485
175) Should/ have to/ must (anonyme) 239 815
176) Have something done (anonyme) 239 743
177) The past (webmaster) 237 757
178) Future continuous and future perfect. (felin) 237 511
179) Used to/would (woodyrun) 237 510
180) How to ask a question in English (bridg) 235 319
181) I wish, if only (felin) 234 036
182) Pluperfect (webmaster) 233 831
183) Countable or Uncountable? (webmaster) 233 087
184) Some / any (younes91) 232 554
185) Should / shouldn't (anonyme) 231 383
186) Present simple or continuous (bridg) 230 785
187) Adjectives - ing and ed (felin) 228 791
188) Hypothesis (webmaster) 228 055
189) Auxiliary BE (anonyme) 226 365
190) Articles a/an/the/0 (bridg) 226 231
191) Article The or nothing (anonyme) 225 861
192) Present perfect with Ever - never - (anonyme) 225 462
193) Must or mustn't (laure95) 225 323
194) Present continuous OR Present simple? (bridg) 225 303
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 735
196) To / in order to / so as to / so that (irish21) 219 902
197) Present perfect (bridg) 219 398
198) Comparison (komiks) 218 128
199) What time is it ? (anonyme) 217 613
200) Indirect speech (bridg) 216 439
