Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 768 439
2) Placement test : grammar for beginners (lucile83) 5 975 334
3) A/AN (webmaster) 5 353 940
4) Auxiliary BE (webmaster) 3 218 825
5) Present continuous (webmaster) 2 991 840
6) Present simple (webmaster) 2 889 660
7) Present simple (webmaster) 2 590 353
8) Present continuous (webmaster) 2 420 100
9) Adjectives (webmaster) 2 090 294
10) A/an (anonyme) 2 009 085
11) Present perfect simple (webmaster) 1 632 118
12) Vocabulary - Placement test (bridg) 1 616 379
13) Preterite (webmaster) 1 610 320
14) Short placement test (webmaster) 1 441 073
15) Preterite (webmaster) 1 436 696
16) To be (bridg) 1 402 247
17) What time is it? (webmaster) 1 345 611
18) Present perfect (webmaster) 1 336 412
19) The alphabet in English (webmaster) 1 317 960
20) Adjectives (lucile83) 1 212 422
21) What time is it? (webmaster) 1 202 289
22) Numbers (webmaster) 1 186 599
23) 'A' ou 'An' (anonyme) 1 170 536
24) Two presents: present continuous, present simple (webmaster) 1 144 396
25) To be (bridg) 1 142 776
26) Comparatives / Superlatives (webmaster) 1 092 307
27) Numbers (webmaster) 1 067 522
28) CAN / MUST (webmaster) 1 056 417
29) THE/ A / AN / nothing (webmaster) 1 027 104
30) Comparatives (webmaster) 1 005 024
31) Family life (bridg) 997 955
32) Numbers > 100 (webmaster) 984 396
33) Future (going to/will/present continuous) (anonyme) 959 320
34) Plural (webmaster) 953 307
35) Superlatives (webmaster) 872 660
36) Adjectives (anonyme) 872 263
37) Simple present (bridg) 850 921
38) Spelled words N°1 (bridg) 847 647
39) Placement test beginners: Check your spelling (lucile83) 828 947
40) Introducing oneself (webmaster) 825 728
41) Adverbs of frequency (lucile83) 813 132
42) Family (bridg) 782 522
43) General test-End of high school / Beginning of university (webmaster) 780 156
44) Frequency adverbs (webmaster) 775 944
45) Present simple (lucile83) 774 607
46) Present BE + Ving (bridg) 762 050
47) Genitive (webmaster) 721 711
48) Family tree (anonyme) 717 426
49) Preterite: simple or continuous? (webmaster) 713 419
50) Passive form (lucile83) 706 175
51) Placement test (beginners) (lili73) 698 568
52) Past simple or present perfect (lucile83) 688 485
53) Future (webmaster) 674 423
54) 2 Preterites (webmaster) 659 017
55) Present perfect simple (bridg) 654 454
56) Preterite (webmaster) 616 223
57) List of 200 irregular verbs and audio (bridg) 613 586
58) Modals (webmaster) 611 336
59) Spelled words N°2 (bridg) 607 355
60) Height (webmaster) 605 106
61) Modals (webmaster) 600 553
62) Articles a / an / the (lucile83) 596 679
63) Plural forms (bridg) 575 285
64) Nationalities (webmaster) 572 808
65) Past continuous / Past simple (anonyme) 558 090
66) Irregular plurals (bridg) 551 810
67) Two presents: simple and continuous (webmaster) 547 579
68) Preterite (bridg) 546 965
69) Vocabulary: greeting people (here4u) 536 322
70) Superlatives (frapedur) 532 013
71) Give your opinion (bridg) 530 252
72) Adverbs of Frequency (bridg) 515 704
73) Present simple or continuous (lucile83) 503 787
74) Present perfect / preterite ? (anonyme) 503 393
75) Possessive case (anonyme) 479 061
76) Countries & nationalities (bridg) 471 309
77) 'The' or nothing? (webmaster) 470 068
78) Introducing oneself (easy) (webmaster) 469 742
79) Past tenses (bridg) 468 212
80) Passive voice (webmaster) 460 312
81) Present Simple vs. Past Simple (anonyme) 451 424
82) Questions : how to ask them (lucile83) 446 280
83) General Test II / End of high school / Beginning of universi (webmaster) 444 984
84) IN, ON, AT or TO? (webmaster) 443 313
85) Relative pronouns (webmaster) 442 187
86) Comparative of superiority (lucile83) 434 923
87) How to pronounce the final -ED? (past simple) (webmaster) 434 379
88) Relative clauses (webmaster) 421 805
89) Sounds: [h] (webmaster) 418 567
90) Comparative (anonyme) 410 732
91) A/an/Ø (bridg) 396 117
92) Future simple (lucile83) 394 082
93) This / That / These / Those (webmaster) 391 343
94) Conditional (webmaster) 389 894
95) Past simple (anonyme) 389 328
96) Passive voice (anonyme) 388 539
97) Comparing (webmaster) 387 175
98) Can / could/ may/ might (woodyrun) 377 806
99) Present perfect or past tense (anonyme) 374 389
100) Personal pronouns (anonyme) 370 606
101) Much, many, little and few (felin) 369 223
102) Some, any, no, enough, too/too much/too many (webmaster) 367 240
103) Preterite continuous (BE + -ING) (webmaster) 366 219
104) Genitive case (bridg) 366 147
105) Confusing words - Placement test (bridg) 363 977
106) Irregular verbs (webmaster) 362 272
107) Numbers from 1 to 10 (lucile83) 360 595
108) Past perfect simple, past perfect continuous (anonyme) 360 222
109) Present continuous or present simple (webmaster) 358 765
110) Present perfect or preterite? (anonyme) 352 983
111) Comparative Adjectives (bridg) 351 167
112) Simple Past : regular verbs (anonyme) 350 828
113) Who, Whom, Which, or Whose? (anonyme) 347 167
114) Past simple (video) (lucile83) 345 931
115) Past simple or past continuous (lucile83) 337 593
116) What time is it? (webmaster) 336 612
117) Modals (tinou) 335 554
118) While / When (anonyme) 334 734
119) Modal: may/might (lucile83) 333 224
120) Cardinal and ordinal numbers (anonyme) 327 660
121) Possessive adjectives and pronouns (woodyrun) 322 659
122) The superlative (anonyme) 321 203
123) How to talk about the weather (lili73) 320 757
124) Since and for (lucile83) 317 381
125) Flags (webmaster) 316 652
126) Irregular verbs (bridg) 314 869
127) Prepositions - in, on, at (anonyme) 313 426
128) Pronouns (woodyrun) 310 091
129) Tenses (anonyme) 309 869
130) Placement test 3 (webmaster) 309 691
131) Order of adjectives (webmaster) 305 330
132) Could/Couldn't (laure95) 304 791
133) Adjectives and prepositions (lucile83) 303 543
134) Comparative (anonyme) 303 373
135) Agreement Tags (webmaster) 303 194
136) Asking questions (webmaster) 301 989
137) Present perfect OR simple past? (bridg) 297 590
138) Questions in the past tense (lucile83) 296 413
139) Superlative Adjectives (bridg) 294 643
140) Uncountable nouns (webmaster) 294 432
141) Object pronouns (bridg) 292 667
142) Placement test 1 (lucile83) 291 617
143) Present simple (lucile83) 288 807
144) Prefer/rather (bridg) 288 227
145) Can/Must/Should (laure95) 287 494
146) Passive form (anonyme) 286 013
147) Must or Have to? (woodyrun) 285 523
148) The/an/nothing (bridg) 283 877
149) Past perfect (lili73) 283 419
150) To be (anonyme) 282 698
151) Vocabulary: asking and answering (here4u) 280 347
152) Can and can't (laure95) 277 902
153) Modal verbs (bridg) 276 589
154) Some / Any / no... (bridg) 269 202
155) Days of the week (bridg) 268 804
156) So / neither (anonyme) 263 535
157) Past simple (video) (lucile83) 262 966
158) Used to (bridg) 259 899
159) Vocabulary: on the phone (here4u) 258 607
160) Past tense (anonyme) 258 536
161) Should / must (anonyme) 258 403
162) Find out a quantity (webmaster) 258 226
163) Superlative + and adjective (lucile83) 256 053
164) Present continuous (chnawa) 254 737
165) Numbers 1/100 (anonyme) 252 470
166) Modal can (video) (lucile83) 252 288
167) Articles : a / an / the / Ø (anonyme) 252 010
168) Comparative and superlative (anonyme) 251 931
169) Relatives pronouns (who, which, that...) (anonyme) 247 706
170) Vocabulary: at the restaurant (here4u) 245 519
171) A few, a little, few, little (anonyme) 243 754
172) Would rather / would prefer to (anonyme) 243 555
173) Present continuous and the Going to form (anonyme) 241 809
174) Comparatives (anonyme) 240 160
175) Have something done (anonyme) 239 134
176) Should/ have to/ must (anonyme) 238 000
177) The past (webmaster) 237 386
178) Future continuous and future perfect. (felin) 236 961
179) Used to/would (woodyrun) 235 900
180) How to ask a question in English (bridg) 233 660
181) I wish, if only (felin) 233 490
182) Pluperfect (webmaster) 233 051
183) Countable or Uncountable? (webmaster) 232 373
184) Present simple or continuous (bridg) 230 714
185) Should / shouldn't (anonyme) 230 398
186) Some / any (younes91) 230 030
187) Adjectives - ing and ed (felin) 228 094
188) Hypothesis (webmaster) 227 219
189) Auxiliary BE (lucile83) 225 755
190) Articles a/an/the/0 (bridg) 225 680
191) Article The or nothing (anonyme) 225 261
192) Present continuous OR Present simple? (bridg) 224 616
193) Present perfect with Ever - never - (anonyme) 224 591
194) Must or mustn't (laure95) 222 869
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 282
196) Present perfect (bridg) 218 851
197) To / in order to / so as to / so that (irish21) 218 387
198) What time is it ? (anonyme) 216 981
199) Indirect speech (bridg) 214 952
200) Comparison (komiks) 213 313
