Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 772 029
2) Placement test : grammar for beginners (lucile83) 5 981 505
3) A/AN (webmaster) 5 358 471
4) Auxiliary BE (webmaster) 3 220 989
5) Present continuous (webmaster) 2 994 860
6) Present simple (webmaster) 2 901 011
7) Present simple (webmaster) 2 593 489
8) Present continuous (webmaster) 2 425 760
9) Adjectives (webmaster) 2 091 504
10) A/an (anonyme) 2 011 601
11) Present perfect simple (webmaster) 1 636 325
12) Preterite (webmaster) 1 617 566
13) Vocabulary - Placement test (bridg) 1 617 515
14) Short placement test (webmaster) 1 441 903
15) Preterite (webmaster) 1 440 987
16) To be (bridg) 1 403 984
17) What time is it? (webmaster) 1 347 058
18) Present perfect (webmaster) 1 340 044
19) The alphabet in English (webmaster) 1 319 099
20) Adjectives (lucile83) 1 213 797
21) What time is it? (webmaster) 1 204 720
22) Numbers (webmaster) 1 187 420
23) 'A' ou 'An' (anonyme) 1 172 504
24) Two presents: present continuous, present simple (webmaster) 1 146 559
25) To be (bridg) 1 143 797
26) Comparatives / Superlatives (webmaster) 1 097 360
27) Numbers (webmaster) 1 068 829
28) CAN / MUST (webmaster) 1 057 214
29) THE/ A / AN / nothing (webmaster) 1 029 986
30) Comparatives (webmaster) 1 005 899
31) Family life (bridg) 999 023
32) Numbers > 100 (webmaster) 985 182
33) Future (going to/will/present continuous) (anonyme) 961 223
34) Plural (webmaster) 954 226
35) Superlatives (webmaster) 873 584
36) Adjectives (anonyme) 873 176
37) Simple present (bridg) 852 112
38) Spelled words N°1 (bridg) 848 628
39) Placement test beginners: Check your spelling (lucile83) 829 417
40) Introducing oneself (webmaster) 826 253
41) Adverbs of frequency (lucile83) 814 744
42) Family (bridg) 783 302
43) General test-End of high school / Beginning of university (webmaster) 781 472
44) Present simple (lucile83) 777 423
45) Frequency adverbs (webmaster) 776 573
46) Present BE + Ving (bridg) 763 196
47) Genitive (webmaster) 722 450
48) Family tree (anonyme) 718 170
49) Preterite: simple or continuous? (webmaster) 714 706
50) Passive form (lucile83) 711 846
51) Placement test (beginners) (lili73) 699 600
52) Past simple or present perfect (lucile83) 690 814
53) Future (webmaster) 675 032
54) 2 Preterites (webmaster) 660 249
55) Present perfect simple (bridg) 656 736
56) Preterite (webmaster) 617 953
57) List of 200 irregular verbs and audio (bridg) 614 575
58) Modals (webmaster) 611 837
59) Spelled words N°2 (bridg) 608 037
60) Height (webmaster) 605 540
61) Modals (webmaster) 602 662
62) Articles a / an / the (lucile83) 596 709
63) Plural forms (bridg) 576 146
64) Nationalities (webmaster) 573 269
65) Past continuous / Past simple (anonyme) 561 620
66) Irregular plurals (bridg) 552 399
67) Two presents: simple and continuous (webmaster) 548 593
68) Preterite (bridg) 547 773
69) Vocabulary: greeting people (here4u) 536 377
70) Superlatives (frapedur) 534 398
71) Give your opinion (bridg) 530 821
72) Adverbs of Frequency (bridg) 516 112
73) Present simple or continuous (lucile83) 507 277
74) Present perfect / preterite ? (anonyme) 505 929
75) Possessive case (anonyme) 479 625
76) Countries & nationalities (bridg) 472 336
77) 'The' or nothing? (webmaster) 470 455
78) Introducing oneself (easy) (webmaster) 470 085
79) Past tenses (bridg) 469 398
80) Passive voice (webmaster) 461 347
81) Present Simple vs. Past Simple (anonyme) 454 314
82) Questions : how to ask them (lucile83) 447 265
83) General Test II / End of high school / Beginning of universi (webmaster) 445 458
84) IN, ON, AT or TO? (webmaster) 444 042
85) Relative pronouns (webmaster) 443 001
86) Comparative of superiority (lucile83) 436 511
87) How to pronounce the final -ED? (past simple) (webmaster) 435 617
88) Relative clauses (webmaster) 422 373
89) Sounds: [h] (webmaster) 418 922
90) Comparative (anonyme) 411 642
91) A/an/Ø (bridg) 397 309
92) Future simple (lucile83) 394 834
93) Past simple (anonyme) 392 442
94) This / That / These / Those (webmaster) 391 826
95) Conditional (webmaster) 390 661
96) Passive voice (anonyme) 389 358
97) Comparing (webmaster) 387 469
98) Can / could/ may/ might (woodyrun) 378 436
99) Present perfect or past tense (anonyme) 375 509
100) Personal pronouns (anonyme) 371 019
101) Much, many, little and few (felin) 370 745
102) Some, any, no, enough, too/too much/too many (webmaster) 367 627
103) Preterite continuous (BE + -ING) (webmaster) 367 303
104) Genitive case (bridg) 366 815
105) Confusing words - Placement test (bridg) 364 249
106) Irregular verbs (webmaster) 362 725
107) Numbers from 1 to 10 (lucile83) 360 932
108) Past perfect simple, past perfect continuous (anonyme) 360 505
109) Present continuous or present simple (webmaster) 359 036
110) Present perfect or preterite? (anonyme) 354 680
111) Comparative Adjectives (bridg) 351 685
112) Simple Past : regular verbs (anonyme) 351 577
113) Who, Whom, Which, or Whose? (anonyme) 347 895
114) Past simple (video) (lucile83) 346 867
115) Past simple or past continuous (lucile83) 339 320
116) What time is it? (webmaster) 337 033
117) While / When (anonyme) 336 499
118) Modals (tinou) 335 897
119) Modal: may/might (lucile83) 333 598
120) Cardinal and ordinal numbers (anonyme) 327 994
121) Possessive adjectives and pronouns (woodyrun) 323 357
122) The superlative (anonyme) 322 804
123) How to talk about the weather (lili73) 320 819
124) Since and for (lucile83) 317 844
125) Flags (webmaster) 316 957
126) Irregular verbs (bridg) 315 314
127) Prepositions - in, on, at (anonyme) 313 693
128) Pronouns (woodyrun) 311 713
129) Tenses (anonyme) 310 695
130) Placement test 3 (webmaster) 309 926
131) Order of adjectives (webmaster) 305 898
132) Could/Couldn't (laure95) 305 345
133) Comparative (anonyme) 303 828
134) Adjectives and prepositions (lucile83) 303 730
135) Agreement Tags (webmaster) 303 480
136) Asking questions (webmaster) 302 454
137) Present perfect OR simple past? (bridg) 297 868
138) Questions in the past tense (lucile83) 296 759
139) Superlative Adjectives (bridg) 295 031
140) Uncountable nouns (webmaster) 294 940
141) Object pronouns (bridg) 293 617
142) Placement test 1 (lucile83) 292 002
143) Present simple (lucile83) 289 719
144) Prefer/rather (bridg) 288 641
145) Can/Must/Should (laure95) 288 264
146) Passive form (anonyme) 287 996
147) Must or Have to? (woodyrun) 286 252
148) Past perfect (lili73) 285 205
149) The/an/nothing (bridg) 284 518
150) To be (anonyme) 283 107
151) Vocabulary: asking and answering (here4u) 280 386
152) Can and can't (laure95) 279 097
153) Modal verbs (bridg) 276 852
154) Some / Any / no... (bridg) 269 769
155) Days of the week (bridg) 268 948
156) So / neither (anonyme) 263 959
157) Past simple (video) (lucile83) 263 207
158) Used to (bridg) 260 047
159) Past tense (anonyme) 258 771
160) Should / must (anonyme) 258 762
161) Vocabulary: on the phone (here4u) 258 652
162) Find out a quantity (webmaster) 258 328
163) Present continuous (chnawa) 257 204
164) Superlative + and adjective (lucile83) 256 470
165) Articles : a / an / the / Ø (anonyme) 254 420
166) Comparative and superlative (anonyme) 253 293
167) Numbers 1/100 (anonyme) 252 983
168) Modal can (video) (lucile83) 252 463
169) Relatives pronouns (who, which, that...) (anonyme) 247 758
170) Vocabulary: at the restaurant (here4u) 245 590
171) A few, a little, few, little (anonyme) 244 426
172) Would rather / would prefer to (anonyme) 243 878
173) Comparatives (anonyme) 243 328
174) Present continuous and the Going to form (anonyme) 242 101
175) Have something done (anonyme) 239 405
176) Should/ have to/ must (anonyme) 238 765
177) The past (webmaster) 237 549
178) Future continuous and future perfect. (felin) 237 207
179) Used to/would (woodyrun) 236 567
180) How to ask a question in English (bridg) 234 404
181) I wish, if only (felin) 233 758
182) Pluperfect (webmaster) 233 446
183) Countable or Uncountable? (webmaster) 232 683
184) Some / any (younes91) 231 010
185) Should / shouldn't (anonyme) 230 842
186) Present simple or continuous (bridg) 230 748
187) Adjectives - ing and ed (felin) 228 387
188) Hypothesis (webmaster) 227 537
189) Auxiliary BE (lucile83) 226 067
190) Articles a/an/the/0 (bridg) 225 864
191) Article The or nothing (anonyme) 225 480
192) Present perfect with Ever - never - (anonyme) 225 161
193) Present continuous OR Present simple? (bridg) 224 942
194) Must or mustn't (laure95) 224 026
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 459
196) To / in order to / so as to / so that (irish21) 219 198
197) Present perfect (bridg) 219 081
198) What time is it ? (anonyme) 217 296
199) Comparison (komiks) 215 638
200) Indirect speech (bridg) 215 525
