Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 770 714
2) Placement test : grammar for beginners (lucile83) 5 979 120
3) A/AN (webmaster) 5 356 829
4) Auxiliary BE (webmaster) 3 220 280
5) Present continuous (webmaster) 2 993 746
6) Present simple (webmaster) 2 897 223
7) Present simple (webmaster) 2 592 480
8) Present continuous (webmaster) 2 423 605
9) Adjectives (webmaster) 2 091 068
10) A/an (anonyme) 2 010 715
11) Present perfect simple (webmaster) 1 634 714
12) Vocabulary - Placement test (bridg) 1 617 079
13) Preterite (webmaster) 1 614 649
14) Short placement test (webmaster) 1 441 609
15) Preterite (webmaster) 1 439 375
16) To be (bridg) 1 403 383
17) What time is it? (webmaster) 1 346 510
18) Present perfect (webmaster) 1 338 688
19) The alphabet in English (webmaster) 1 318 680
20) Adjectives (lucile83) 1 213 296
21) What time is it? (webmaster) 1 203 703
22) Numbers (webmaster) 1 187 151
23) 'A' ou 'An' (anonyme) 1 171 767
24) Two presents: present continuous, present simple (webmaster) 1 145 902
25) To be (bridg) 1 143 413
26) Comparatives / Superlatives (webmaster) 1 095 266
27) Numbers (webmaster) 1 068 356
28) CAN / MUST (webmaster) 1 056 892
29) THE/ A / AN / nothing (webmaster) 1 028 935
30) Comparatives (webmaster) 1 005 639
31) Family life (bridg) 998 678
32) Numbers > 100 (webmaster) 984 927
33) Future (going to/will/present continuous) (anonyme) 960 539
34) Plural (webmaster) 953 932
35) Superlatives (webmaster) 873 218
36) Adjectives (anonyme) 872 873
37) Simple present (bridg) 851 706
38) Spelled words N°1 (bridg) 848 269
39) Placement test beginners: Check your spelling (lucile83) 829 219
40) Introducing oneself (webmaster) 826 050
41) Adverbs of frequency (lucile83) 814 117
42) Family (bridg) 783 000
43) General test-End of high school / Beginning of university (webmaster) 780 899
44) Frequency adverbs (webmaster) 776 367
45) Present simple (lucile83) 776 362
46) Present BE + Ving (bridg) 762 781
47) Genitive (webmaster) 722 123
48) Family tree (anonyme) 717 896
49) Preterite: simple or continuous? (webmaster) 714 188
50) Passive form (lucile83) 709 456
51) Placement test (beginners) (lili73) 699 210
52) Past simple or present perfect (lucile83) 689 930
53) Future (webmaster) 674 791
54) 2 Preterites (webmaster) 659 724
55) Present perfect simple (bridg) 655 867
56) Preterite (webmaster) 617 266
57) List of 200 irregular verbs and audio (bridg) 614 193
58) Modals (webmaster) 611 647
59) Spelled words N°2 (bridg) 607 760
60) Height (webmaster) 605 417
61) Modals (webmaster) 601 770
62) Articles a / an / the (lucile83) 596 700
63) Plural forms (bridg) 575 855
64) Nationalities (webmaster) 573 084
65) Past continuous / Past simple (anonyme) 560 270
66) Irregular plurals (bridg) 552 196
67) Two presents: simple and continuous (webmaster) 548 232
68) Preterite (bridg) 547 444
69) Vocabulary: greeting people (here4u) 536 353
70) Superlatives (frapedur) 533 572
71) Give your opinion (bridg) 530 599
72) Adverbs of Frequency (bridg) 515 951
73) Present simple or continuous (lucile83) 506 081
74) Present perfect / preterite ? (anonyme) 504 949
75) Possessive case (anonyme) 479 457
76) Countries & nationalities (bridg) 471 955
77) 'The' or nothing? (webmaster) 470 326
78) Introducing oneself (easy) (webmaster) 469 959
79) Past tenses (bridg) 468 914
80) Passive voice (webmaster) 460 904
81) Present Simple vs. Past Simple (anonyme) 453 240
82) Questions : how to ask them (lucile83) 446 983
83) General Test II / End of high school / Beginning of universi (webmaster) 445 245
84) IN, ON, AT or TO? (webmaster) 443 709
85) Relative pronouns (webmaster) 442 739
86) Comparative of superiority (lucile83) 435 996
87) How to pronounce the final -ED? (past simple) (webmaster) 435 215
88) Relative clauses (webmaster) 422 183
89) Sounds: [h] (webmaster) 418 800
90) Comparative (anonyme) 411 309
91) A/an/Ø (bridg) 396 815
92) Future simple (lucile83) 394 544
93) This / That / These / Those (webmaster) 391 681
94) Past simple (anonyme) 391 171
95) Conditional (webmaster) 390 348
96) Passive voice (anonyme) 388 998
97) Comparing (webmaster) 387 360
98) Can / could/ may/ might (woodyrun) 378 247
99) Present perfect or past tense (anonyme) 375 015
100) Personal pronouns (anonyme) 370 874
101) Much, many, little and few (felin) 370 063
102) Some, any, no, enough, too/too much/too many (webmaster) 367 419
103) Preterite continuous (BE + -ING) (webmaster) 366 867
104) Genitive case (bridg) 366 529
105) Confusing words - Placement test (bridg) 364 138
106) Irregular verbs (webmaster) 362 561
107) Numbers from 1 to 10 (lucile83) 360 801
108) Past perfect simple, past perfect continuous (anonyme) 360 395
109) Present continuous or present simple (webmaster) 358 932
110) Present perfect or preterite? (anonyme) 354 006
111) Comparative Adjectives (bridg) 351 579
112) Simple Past : regular verbs (anonyme) 351 292
113) Who, Whom, Which, or Whose? (anonyme) 347 661
114) Past simple (video) (lucile83) 346 554
115) Past simple or past continuous (lucile83) 338 481
116) What time is it? (webmaster) 336 891
117) While / When (anonyme) 335 942
118) Modals (tinou) 335 766
119) Modal: may/might (lucile83) 333 426
120) Cardinal and ordinal numbers (anonyme) 327 871
121) Possessive adjectives and pronouns (woodyrun) 323 122
122) The superlative (anonyme) 322 142
123) How to talk about the weather (lili73) 320 798
124) Since and for (lucile83) 317 667
125) Flags (webmaster) 316 843
126) Irregular verbs (bridg) 315 182
127) Prepositions - in, on, at (anonyme) 313 618
128) Pronouns (woodyrun) 311 250
129) Tenses (anonyme) 310 408
130) Placement test 3 (webmaster) 309 852
131) Order of adjectives (webmaster) 305 610
132) Could/Couldn't (laure95) 305 246
133) Comparative (anonyme) 303 674
134) Adjectives and prepositions (lucile83) 303 650
135) Agreement Tags (webmaster) 303 390
136) Asking questions (webmaster) 302 313
137) Present perfect OR simple past? (bridg) 297 782
138) Questions in the past tense (lucile83) 296 577
139) Superlative Adjectives (bridg) 294 913
140) Uncountable nouns (webmaster) 294 696
141) Object pronouns (bridg) 293 360
142) Placement test 1 (lucile83) 291 861
143) Present simple (lucile83) 289 392
144) Prefer/rather (bridg) 288 469
145) Can/Must/Should (laure95) 287 944
146) Passive form (anonyme) 287 107
147) Must or Have to? (woodyrun) 285 949
148) Past perfect (lili73) 284 379
149) The/an/nothing (bridg) 284 337
150) To be (anonyme) 282 966
151) Vocabulary: asking and answering (here4u) 280 374
152) Can and can't (laure95) 278 659
153) Modal verbs (bridg) 276 758
154) Some / Any / no... (bridg) 269 553
155) Days of the week (bridg) 268 912
156) So / neither (anonyme) 263 799
157) Past simple (video) (lucile83) 263 136
158) Used to (bridg) 259 989
159) Past tense (anonyme) 258 680
160) Vocabulary: on the phone (here4u) 258 638
161) Should / must (anonyme) 258 637
162) Find out a quantity (webmaster) 258 289
163) Superlative + and adjective (lucile83) 256 322
164) Present continuous (chnawa) 256 222
165) Articles : a / an / the / Ø (anonyme) 253 601
166) Numbers 1/100 (anonyme) 252 776
167) Comparative and superlative (anonyme) 252 725
168) Modal can (video) (lucile83) 252 406
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) 244 022
172) Would rather / would prefer to (anonyme) 243 799
173) Comparatives (anonyme) 242 199
174) Present continuous and the Going to form (anonyme) 242 001
175) Have something done (anonyme) 239 290
176) Should/ have to/ must (anonyme) 238 471
177) The past (webmaster) 237 489
178) Future continuous and future perfect. (felin) 237 077
179) Used to/would (woodyrun) 236 297
180) How to ask a question in English (bridg) 234 126
181) I wish, if only (felin) 233 681
182) Pluperfect (webmaster) 233 287
183) Countable or Uncountable? (webmaster) 232 551
184) Present simple or continuous (bridg) 230 733
185) Should / shouldn't (anonyme) 230 713
186) Some / any (younes91) 230 490
187) Adjectives - ing and ed (felin) 228 280
188) Hypothesis (webmaster) 227 403
189) Auxiliary BE (lucile83) 225 974
190) Articles a/an/the/0 (bridg) 225 797
191) Article The or nothing (anonyme) 225 384
192) Present perfect with Ever - never - (anonyme) 225 021
193) Present continuous OR Present simple? (bridg) 224 792
194) Must or mustn't (laure95) 223 597
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 375
196) Present perfect (bridg) 218 966
197) To / in order to / so as to / so that (irish21) 218 921
198) What time is it ? (anonyme) 217 222
199) Indirect speech (bridg) 215 271
200) Comparison (komiks) 214 750
