Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 770 568
2) Placement test : grammar for beginners (lucile83) 5 978 899
3) A/AN (webmaster) 5 356 665
4) Auxiliary BE (webmaster) 3 220 202
5) Present continuous (webmaster) 2 993 644
6) Present simple (webmaster) 2 896 924
7) Present simple (webmaster) 2 592 394
8) Present continuous (webmaster) 2 423 382
9) Adjectives (webmaster) 2 091 021
10) A/an (anonyme) 2 010 629
11) Present perfect simple (webmaster) 1 634 549
12) Vocabulary - Placement test (bridg) 1 617 046
13) Preterite (webmaster) 1 614 421
14) Short placement test (webmaster) 1 441 575
15) Preterite (webmaster) 1 439 265
16) To be (bridg) 1 403 344
17) What time is it? (webmaster) 1 346 438
18) Present perfect (webmaster) 1 338 565
19) The alphabet in English (webmaster) 1 318 644
20) Adjectives (lucile83) 1 213 238
21) What time is it? (webmaster) 1 203 585
22) Numbers (webmaster) 1 187 111
23) 'A' ou 'An' (anonyme) 1 171 699
24) Two presents: present continuous, present simple (webmaster) 1 145 792
25) To be (bridg) 1 143 384
26) Comparatives / Superlatives (webmaster) 1 095 025
27) Numbers (webmaster) 1 068 307
28) CAN / MUST (webmaster) 1 056 876
29) THE/ A / AN / nothing (webmaster) 1 028 801
30) Comparatives (webmaster) 1 005 549
31) Family life (bridg) 998 649
32) Numbers > 100 (webmaster) 984 874
33) Future (going to/will/present continuous) (anonyme) 960 438
34) Plural (webmaster) 953 904
35) Superlatives (webmaster) 873 138
36) Adjectives (anonyme) 872 853
37) Simple present (bridg) 851 672
38) Spelled words N°1 (bridg) 848 244
39) Placement test beginners: Check your spelling (lucile83) 829 204
40) Introducing oneself (webmaster) 826 038
41) Adverbs of frequency (lucile83) 814 077
42) Family (bridg) 782 983
43) General test-End of high school / Beginning of university (webmaster) 780 876
44) Frequency adverbs (webmaster) 776 349
45) Present simple (lucile83) 776 260
46) Present BE + Ving (bridg) 762 732
47) Genitive (webmaster) 722 086
48) Family tree (anonyme) 717 852
49) Preterite: simple or continuous? (webmaster) 714 154
50) Passive form (lucile83) 709 271
51) Placement test (beginners) (lili73) 699 162
52) Past simple or present perfect (lucile83) 689 849
53) Future (webmaster) 674 773
54) 2 Preterites (webmaster) 659 680
55) Present perfect simple (bridg) 655 774
56) Preterite (webmaster) 617 187
57) List of 200 irregular verbs and audio (bridg) 614 139
58) Modals (webmaster) 611 626
59) Spelled words N°2 (bridg) 607 735
60) Height (webmaster) 605 404
61) Modals (webmaster) 601 690
62) Articles a / an / the (lucile83) 596 700
63) Plural forms (bridg) 575 816
64) Nationalities (webmaster) 573 073
65) Past continuous / Past simple (anonyme) 560 139
66) Irregular plurals (bridg) 552 171
67) Two presents: simple and continuous (webmaster) 548 200
68) Preterite (bridg) 547 379
69) Vocabulary: greeting people (here4u) 536 352
70) Superlatives (frapedur) 533 448
71) Give your opinion (bridg) 530 586
72) Adverbs of Frequency (bridg) 515 942
73) Present simple or continuous (lucile83) 505 941
74) Present perfect / preterite ? (anonyme) 504 853
75) Possessive case (anonyme) 479 428
76) Countries & nationalities (bridg) 471 940
77) 'The' or nothing? (webmaster) 470 308
78) Introducing oneself (easy) (webmaster) 469 952
79) Past tenses (bridg) 468 865
80) Passive voice (webmaster) 460 868
81) Present Simple vs. Past Simple (anonyme) 453 187
82) Questions : how to ask them (lucile83) 446 961
83) General Test II / End of high school / Beginning of universi (webmaster) 445 228
84) IN, ON, AT or TO? (webmaster) 443 687
85) Relative pronouns (webmaster) 442 717
86) Comparative of superiority (lucile83) 435 937
87) How to pronounce the final -ED? (past simple) (webmaster) 435 187
88) Relative clauses (webmaster) 422 170
89) Sounds: [h] (webmaster) 418 791
90) Comparative (anonyme) 411 220
91) A/an/Ø (bridg) 396 786
92) Future simple (lucile83) 394 528
93) This / That / These / Those (webmaster) 391 661
94) Past simple (anonyme) 391 069
95) Conditional (webmaster) 390 313
96) Passive voice (anonyme) 388 975
97) Comparing (webmaster) 387 342
98) Can / could/ may/ might (woodyrun) 378 229
99) Present perfect or past tense (anonyme) 374 970
100) Personal pronouns (anonyme) 370 866
101) Much, many, little and few (felin) 370 011
102) Some, any, no, enough, too/too much/too many (webmaster) 367 412
103) Preterite continuous (BE + -ING) (webmaster) 366 826
104) Genitive case (bridg) 366 492
105) Confusing words - Placement test (bridg) 364 132
106) Irregular verbs (webmaster) 362 538
107) Numbers from 1 to 10 (lucile83) 360 794
108) Past perfect simple, past perfect continuous (anonyme) 360 384
109) Present continuous or present simple (webmaster) 358 913
110) Present perfect or preterite? (anonyme) 353 943
111) Comparative Adjectives (bridg) 351 505
112) Simple Past : regular verbs (anonyme) 351 281
113) Who, Whom, Which, or Whose? (anonyme) 347 640
114) Past simple (video) (lucile83) 346 529
115) Past simple or past continuous (lucile83) 338 448
116) What time is it? (webmaster) 336 882
117) While / When (anonyme) 335 846
118) Modals (tinou) 335 760
119) Modal: may/might (lucile83) 333 407
120) Cardinal and ordinal numbers (anonyme) 327 860
121) Possessive adjectives and pronouns (woodyrun) 323 101
122) The superlative (anonyme) 322 092
123) How to talk about the weather (lili73) 320 798
124) Since and for (lucile83) 317 649
125) Flags (webmaster) 316 836
126) Irregular verbs (bridg) 315 155
127) Prepositions - in, on, at (anonyme) 313 616
128) Pronouns (woodyrun) 311 152
129) Tenses (anonyme) 310 397
130) Placement test 3 (webmaster) 309 841
131) Order of adjectives (webmaster) 305 561
132) Could/Couldn't (laure95) 305 239
133) Comparative (anonyme) 303 662
134) Adjectives and prepositions (lucile83) 303 644
135) Agreement Tags (webmaster) 303 384
136) Asking questions (webmaster) 302 300
137) Present perfect OR simple past? (bridg) 297 762
138) Questions in the past tense (lucile83) 296 575
139) Superlative Adjectives (bridg) 294 833
140) Uncountable nouns (webmaster) 294 687
141) Object pronouns (bridg) 293 287
142) Placement test 1 (lucile83) 291 842
143) Present simple (lucile83) 289 367
144) Prefer/rather (bridg) 288 458
145) Can/Must/Should (laure95) 287 871
146) Passive form (anonyme) 287 038
147) Must or Have to? (woodyrun) 285 927
148) Past perfect (lili73) 284 316
149) The/an/nothing (bridg) 284 315
150) To be (anonyme) 282 956
151) Vocabulary: asking and answering (here4u) 280 371
152) Can and can't (laure95) 278 628
153) Modal verbs (bridg) 276 750
154) Some / Any / no... (bridg) 269 541
155) Days of the week (bridg) 268 909
156) So / neither (anonyme) 263 786
157) Past simple (video) (lucile83) 263 128
158) Used to (bridg) 259 985
159) Past tense (anonyme) 258 675
160) Vocabulary: on the phone (here4u) 258 635
161) Should / must (anonyme) 258 569
162) Find out a quantity (webmaster) 258 287
163) Superlative + and adjective (lucile83) 256 299
164) Present continuous (chnawa) 256 168
165) Articles : a / an / the / Ø (anonyme) 253 437
166) Numbers 1/100 (anonyme) 252 767
167) Comparative and superlative (anonyme) 252 679
168) Modal can (video) (lucile83) 252 397
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) 244 003
172) Would rather / would prefer to (anonyme) 243 792
173) Comparatives (anonyme) 242 112
174) Present continuous and the Going to form (anonyme) 241 987
175) Have something done (anonyme) 239 278
176) Should/ have to/ must (anonyme) 238 451
177) The past (webmaster) 237 483
178) Future continuous and future perfect. (felin) 237 066
179) Used to/would (woodyrun) 236 282
180) How to ask a question in English (bridg) 234 096
181) I wish, if only (felin) 233 675
182) Pluperfect (webmaster) 233 249
183) Countable or Uncountable? (webmaster) 232 545
184) Present simple or continuous (bridg) 230 731
185) Should / shouldn't (anonyme) 230 700
186) Some / any (younes91) 230 467
187) Adjectives - ing and ed (felin) 228 270
188) Hypothesis (webmaster) 227 395
189) Auxiliary BE (lucile83) 225 968
190) Articles a/an/the/0 (bridg) 225 790
191) Article The or nothing (anonyme) 225 377
192) Present perfect with Ever - never - (anonyme) 224 929
193) Present continuous OR Present simple? (bridg) 224 778
194) Must or mustn't (laure95) 223 577
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 374
196) Present perfect (bridg) 218 952
197) To / in order to / so as to / so that (irish21) 218 914
198) What time is it ? (anonyme) 217 218
199) Indirect speech (bridg) 215 249
200) Comparison (komiks) 214 680
