Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 770 656
2) Placement test : grammar for beginners (lucile83) 5 979 008
3) A/AN (webmaster) 5 356 740
4) Auxiliary BE (webmaster) 3 220 239
5) Present continuous (webmaster) 2 993 708
6) Present simple (webmaster) 2 897 052
7) Present simple (webmaster) 2 592 428
8) Present continuous (webmaster) 2 423 475
9) Adjectives (webmaster) 2 091 047
10) A/an (anonyme) 2 010 673
11) Present perfect simple (webmaster) 1 634 614
12) Vocabulary - Placement test (bridg) 1 617 061
13) Preterite (webmaster) 1 614 484
14) Short placement test (webmaster) 1 441 594
15) Preterite (webmaster) 1 439 306
16) To be (bridg) 1 403 364
17) What time is it? (webmaster) 1 346 460
18) Present perfect (webmaster) 1 338 603
19) The alphabet in English (webmaster) 1 318 665
20) Adjectives (lucile83) 1 213 263
21) What time is it? (webmaster) 1 203 631
22) Numbers (webmaster) 1 187 135
23) 'A' ou 'An' (anonyme) 1 171 738
24) Two presents: present continuous, present simple (webmaster) 1 145 820
25) To be (bridg) 1 143 401
26) Comparatives / Superlatives (webmaster) 1 095 142
27) Numbers (webmaster) 1 068 321
28) CAN / MUST (webmaster) 1 056 879
29) THE/ A / AN / nothing (webmaster) 1 028 872
30) Comparatives (webmaster) 1 005 628
31) Family life (bridg) 998 665
32) Numbers > 100 (webmaster) 984 893
33) Future (going to/will/present continuous) (anonyme) 960 496
34) Plural (webmaster) 953 915
35) Superlatives (webmaster) 873 207
36) Adjectives (anonyme) 872 862
37) Simple present (bridg) 851 688
38) Spelled words N°1 (bridg) 848 262
39) Placement test beginners: Check your spelling (lucile83) 829 209
40) Introducing oneself (webmaster) 826 042
41) Adverbs of frequency (lucile83) 814 095
42) Family (bridg) 782 993
43) General test-End of high school / Beginning of university (webmaster) 780 895
44) Frequency adverbs (webmaster) 776 361
45) Present simple (lucile83) 776 320
46) Present BE + Ving (bridg) 762 767
47) Genitive (webmaster) 722 100
48) Family tree (anonyme) 717 890
49) Preterite: simple or continuous? (webmaster) 714 167
50) Passive form (lucile83) 709 331
51) Placement test (beginners) (lili73) 699 194
52) Past simple or present perfect (lucile83) 689 869
53) Future (webmaster) 674 786
54) 2 Preterites (webmaster) 659 696
55) Present perfect simple (bridg) 655 792
56) Preterite (webmaster) 617 237
57) List of 200 irregular verbs and audio (bridg) 614 171
58) Modals (webmaster) 611 635
59) Spelled words N°2 (bridg) 607 754
60) Height (webmaster) 605 413
61) Modals (webmaster) 601 726
62) Articles a / an / the (lucile83) 596 700
63) Plural forms (bridg) 575 827
64) Nationalities (webmaster) 573 075
65) Past continuous / Past simple (anonyme) 560 209
66) Irregular plurals (bridg) 552 176
67) Two presents: simple and continuous (webmaster) 548 207
68) Preterite (bridg) 547 419
69) Vocabulary: greeting people (here4u) 536 352
70) Superlatives (frapedur) 533 535
71) Give your opinion (bridg) 530 593
72) Adverbs of Frequency (bridg) 515 945
73) Present simple or continuous (lucile83) 505 972
74) Present perfect / preterite ? (anonyme) 504 886
75) Possessive case (anonyme) 479 442
76) Countries & nationalities (bridg) 471 946
77) 'The' or nothing? (webmaster) 470 316
78) Introducing oneself (easy) (webmaster) 469 956
79) Past tenses (bridg) 468 874
80) Passive voice (webmaster) 460 887
81) Present Simple vs. Past Simple (anonyme) 453 204
82) Questions : how to ask them (lucile83) 446 973
83) General Test II / End of high school / Beginning of universi (webmaster) 445 242
84) IN, ON, AT or TO? (webmaster) 443 696
85) Relative pronouns (webmaster) 442 722
86) Comparative of superiority (lucile83) 435 959
87) How to pronounce the final -ED? (past simple) (webmaster) 435 199
88) Relative clauses (webmaster) 422 173
89) Sounds: [h] (webmaster) 418 795
90) Comparative (anonyme) 411 291
91) A/an/Ø (bridg) 396 792
92) Future simple (lucile83) 394 533
93) This / That / These / Those (webmaster) 391 667
94) Past simple (anonyme) 391 107
95) Conditional (webmaster) 390 327
96) Passive voice (anonyme) 388 981
97) Comparing (webmaster) 387 355
98) Can / could/ may/ might (woodyrun) 378 237
99) Present perfect or past tense (anonyme) 374 982
100) Personal pronouns (anonyme) 370 873
101) Much, many, little and few (felin) 370 029
102) Some, any, no, enough, too/too much/too many (webmaster) 367 416
103) Preterite continuous (BE + -ING) (webmaster) 366 840
104) Genitive case (bridg) 366 520
105) Confusing words - Placement test (bridg) 364 135
106) Irregular verbs (webmaster) 362 555
107) Numbers from 1 to 10 (lucile83) 360 797
108) Past perfect simple, past perfect continuous (anonyme) 360 389
109) Present continuous or present simple (webmaster) 358 928
110) Present perfect or preterite? (anonyme) 353 974
111) Comparative Adjectives (bridg) 351 576
112) Simple Past : regular verbs (anonyme) 351 283
113) Who, Whom, Which, or Whose? (anonyme) 347 650
114) Past simple (video) (lucile83) 346 541
115) Past simple or past continuous (lucile83) 338 453
116) What time is it? (webmaster) 336 889
117) While / When (anonyme) 335 915
118) Modals (tinou) 335 763
119) Modal: may/might (lucile83) 333 417
120) Cardinal and ordinal numbers (anonyme) 327 867
121) Possessive adjectives and pronouns (woodyrun) 323 114
122) The superlative (anonyme) 322 118
123) How to talk about the weather (lili73) 320 798
124) Since and for (lucile83) 317 656
125) Flags (webmaster) 316 838
126) Irregular verbs (bridg) 315 172
127) Prepositions - in, on, at (anonyme) 313 618
128) Pronouns (woodyrun) 311 200
129) Tenses (anonyme) 310 402
130) Placement test 3 (webmaster) 309 844
131) Order of adjectives (webmaster) 305 589
132) Could/Couldn't (laure95) 305 241
133) Comparative (anonyme) 303 666
134) Adjectives and prepositions (lucile83) 303 645
135) Agreement Tags (webmaster) 303 386
136) Asking questions (webmaster) 302 307
137) Present perfect OR simple past? (bridg) 297 776
138) Questions in the past tense (lucile83) 296 575
139) Superlative Adjectives (bridg) 294 898
140) Uncountable nouns (webmaster) 294 689
141) Object pronouns (bridg) 293 316
142) Placement test 1 (lucile83) 291 852
143) Present simple (lucile83) 289 379
144) Prefer/rather (bridg) 288 461
145) Can/Must/Should (laure95) 287 927
146) Passive form (anonyme) 287 057
147) Must or Have to? (woodyrun) 285 937
148) Past perfect (lili73) 284 345
149) The/an/nothing (bridg) 284 322
150) To be (anonyme) 282 959
151) Vocabulary: asking and answering (here4u) 280 374
152) Can and can't (laure95) 278 634
153) Modal verbs (bridg) 276 751
154) Some / Any / no... (bridg) 269 549
155) Days of the week (bridg) 268 912
156) So / neither (anonyme) 263 792
157) Past simple (video) (lucile83) 263 131
158) Used to (bridg) 259 987
159) Past tense (anonyme) 258 678
160) Vocabulary: on the phone (here4u) 258 635
161) Should / must (anonyme) 258 610
162) Find out a quantity (webmaster) 258 288
163) Superlative + and adjective (lucile83) 256 302
164) Present continuous (chnawa) 256 190
165) Articles : a / an / the / Ø (anonyme) 253 523
166) Numbers 1/100 (anonyme) 252 771
167) Comparative and superlative (anonyme) 252 690
168) Modal can (video) (lucile83) 252 400
169) Relatives pronouns (who, which, that...) (anonyme) 247 719
170) Vocabulary: at the restaurant (here4u) 245 576
171) A few, a little, few, little (anonyme) 244 011
172) Would rather / would prefer to (anonyme) 243 793
173) Comparatives (anonyme) 242 140
174) Present continuous and the Going to form (anonyme) 241 991
175) Have something done (anonyme) 239 281
176) Should/ have to/ must (anonyme) 238 462
177) The past (webmaster) 237 489
178) Future continuous and future perfect. (felin) 237 069
179) Used to/would (woodyrun) 236 291
180) How to ask a question in English (bridg) 234 108
181) I wish, if only (felin) 233 677
182) Pluperfect (webmaster) 233 253
183) Countable or Uncountable? (webmaster) 232 548
184) Present simple or continuous (bridg) 230 731
185) Should / shouldn't (anonyme) 230 702
186) Some / any (younes91) 230 479
187) Adjectives - ing and ed (felin) 228 276
188) Hypothesis (webmaster) 227 398
189) Auxiliary BE (lucile83) 225 972
190) Articles a/an/the/0 (bridg) 225 794
191) Article The or nothing (anonyme) 225 381
192) Present perfect with Ever - never - (anonyme) 224 952
193) Present continuous OR Present simple? (bridg) 224 779
194) Must or mustn't (laure95) 223 587
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 375
196) Present perfect (bridg) 218 960
197) To / in order to / so as to / so that (irish21) 218 916
198) What time is it ? (anonyme) 217 218
199) Indirect speech (bridg) 215 257
200) Comparison (komiks) 214 717
