Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 778 599
2) Placement test : grammar for beginners (anonyme) 5 992 526
3) A/AN (webmaster) 5 365 373
4) Auxiliary BE (webmaster) 3 224 384
5) Present continuous (webmaster) 2 999 347
6) Present simple (webmaster) 2 915 182
7) Present simple (webmaster) 2 597 646
8) Present continuous (webmaster) 2 434 983
9) Adjectives (webmaster) 2 093 669
10) A/an (anonyme) 2 015 462
11) Present perfect simple (webmaster) 1 643 894
12) Preterite (webmaster) 1 628 821
13) Vocabulary - Placement test (bridg) 1 619 262
14) Preterite (webmaster) 1 447 905
15) Short placement test (webmaster) 1 443 625
16) To be (bridg) 1 406 307
17) What time is it? (webmaster) 1 349 482
18) Present perfect (webmaster) 1 346 451
19) The alphabet in English (webmaster) 1 321 184
20) Adjectives (anonyme) 1 215 999
21) What time is it? (webmaster) 1 208 667
22) Numbers (webmaster) 1 188 606
23) 'A' ou 'An' (anonyme) 1 175 650
24) Two presents: present continuous, present simple (webmaster) 1 149 507
25) To be (bridg) 1 145 625
26) Comparatives / Superlatives (webmaster) 1 104 637
27) Numbers (webmaster) 1 070 892
28) CAN / MUST (webmaster) 1 058 723
29) THE/ A / AN / nothing (webmaster) 1 033 818
30) Comparatives (webmaster) 1 007 263
31) Family life (bridg) 1 000 895
32) Numbers > 100 (webmaster) 986 352
33) Future (going to/will/present continuous) (anonyme) 964 189
34) Plural (webmaster) 955 821
35) Superlatives (webmaster) 875 330
36) Adjectives (anonyme) 874 872
37) Simple present (bridg) 854 043
38) Spelled words N°1 (bridg) 850 228
39) Placement test beginners: Check your spelling (anonyme) 830 116
40) Introducing oneself (webmaster) 827 225
41) Adverbs of frequency (anonyme) 817 592
42) Family (bridg) 784 841
43) General test-End of high school / Beginning of university (webmaster) 782 923
44) Present simple (anonyme) 780 838
45) Frequency adverbs (webmaster) 777 814
46) Present BE + Ving (bridg) 765 176
47) Genitive (webmaster) 723 712
48) Passive form (anonyme) 722 672
49) Family tree (anonyme) 719 451
50) Preterite: simple or continuous? (webmaster) 716 804
51) Placement test (beginners) (lili73) 701 187
52) Past simple or present perfect (anonyme) 694 317
53) Future (webmaster) 675 988
54) 2 Preterites (webmaster) 662 134
55) Present perfect simple (bridg) 661 436
56) Preterite (webmaster) 620 538
57) List of 200 irregular verbs and audio (bridg) 616 117
58) Modals (webmaster) 612 746
59) Spelled words N°2 (bridg) 609 232
60) Height (webmaster) 606 342
61) Modals (webmaster) 605 626
62) Articles a / an / the (anonyme) 596 759
63) Plural forms (bridg) 577 540
64) Nationalities (webmaster) 574 309
65) Past continuous / Past simple (anonyme) 566 603
66) Irregular plurals (bridg) 553 683
67) Two presents: simple and continuous (webmaster) 549 717
68) Preterite (bridg) 549 123
69) Superlatives (frapedur) 539 085
70) Vocabulary: greeting people (here4u) 536 468
71) Give your opinion (bridg) 532 015
72) Adverbs of Frequency (bridg) 516 982
73) Present simple or continuous (anonyme) 511 398
74) Present perfect / preterite ? (anonyme) 509 767
75) Possessive case (anonyme) 480 705
76) Countries & nationalities (bridg) 473 534
77) 'The' or nothing? (webmaster) 471 266
78) Past tenses (bridg) 470 933
79) Introducing oneself (easy) (webmaster) 470 750
80) Passive voice (webmaster) 463 532
81) Present Simple vs. Past Simple (anonyme) 457 329
82) Questions : how to ask them (anonyme) 448 466
83) General Test II / End of high school / Beginning of universi (webmaster) 446 185
84) IN, ON, AT or TO? (webmaster) 445 298
85) Relative pronouns (webmaster) 444 559
86) Comparative of superiority (anonyme) 438 738
87) How to pronounce the final -ED? (past simple) (webmaster) 437 915
88) Relative clauses (webmaster) 423 341
89) Sounds: [h] (webmaster) 419 537
90) Comparative (anonyme) 413 729
91) A/an/Ø (bridg) 398 864
92) Past simple (anonyme) 397 433
93) Future simple (anonyme) 396 443
94) This / That / These / Those (webmaster) 392 557
95) Conditional (webmaster) 391 697
96) Passive voice (anonyme) 390 674
97) Comparing (webmaster) 388 038
98) Can / could/ may/ might (woodyrun) 379 528
99) Present perfect or past tense (anonyme) 377 534
100) Much, many, little and few (felin) 372 893
101) Personal pronouns (anonyme) 371 293
102) Preterite continuous (BE + -ING) (webmaster) 369 362
103) Some, any, no, enough, too/too much/too many (webmaster) 368 122
104) Genitive case (bridg) 368 089
105) Confusing words - Placement test (bridg) 364 538
106) Irregular verbs (webmaster) 363 622
107) Numbers from 1 to 10 (anonyme) 361 545
108) Past perfect simple, past perfect continuous (anonyme) 360 923
109) Present continuous or present simple (webmaster) 359 587
110) Present perfect or preterite? (anonyme) 356 933
111) Simple Past : regular verbs (anonyme) 353 142
112) Comparative Adjectives (bridg) 352 248
113) Who, Whom, Which, or Whose? (anonyme) 348 833
114) Past simple (video) (anonyme) 348 478
115) Past simple or past continuous (anonyme) 342 828
116) While / When (anonyme) 338 847
117) What time is it? (webmaster) 337 967
118) Modals (tinou) 336 576
119) Modal: may/might (anonyme) 334 228
120) Cardinal and ordinal numbers (anonyme) 328 741
121) The superlative (anonyme) 325 604
122) Possessive adjectives and pronouns (woodyrun) 324 229
123) How to talk about the weather (lili73) 320 888
124) Since and for (anonyme) 318 880
125) Flags (webmaster) 317 602
126) Irregular verbs (bridg) 316 036
127) Prepositions - in, on, at (anonyme) 314 140
128) Pronouns (woodyrun) 313 710
129) Tenses (anonyme) 311 967
130) Placement test 3 (webmaster) 310 478
131) Order of adjectives (webmaster) 306 596
132) Could/Couldn't (laure95) 305 869
133) Comparative (anonyme) 304 623
134) Agreement Tags (webmaster) 304 057
135) Adjectives and prepositions (anonyme) 304 041
136) Asking questions (webmaster) 303 105
137) Present perfect OR simple past? (bridg) 298 380
138) Questions in the past tense (anonyme) 297 581
139) Superlative Adjectives (bridg) 295 833
140) Uncountable nouns (webmaster) 295 653
141) Object pronouns (bridg) 295 016
142) Placement test 1 (anonyme) 292 807
143) Passive form (anonyme) 291 354
144) Present simple (anonyme) 291 276
145) Prefer/rather (bridg) 289 418
146) Can/Must/Should (laure95) 289 393
147) Past perfect (lili73) 288 283
148) Must or Have to? (woodyrun) 287 540
149) The/an/nothing (bridg) 285 270
150) To be (anonyme) 283 494
151) Can and can't (laure95) 281 631
152) Vocabulary: asking and answering (here4u) 280 443
153) Modal verbs (bridg) 277 292
154) Some / Any / no... (bridg) 270 519
155) Days of the week (bridg) 269 109
156) So / neither (anonyme) 264 362
157) Past simple (video) (anonyme) 263 734
158) Used to (bridg) 260 369
159) Present continuous (chnawa) 260 197
160) Should / must (anonyme) 259 587
161) Past tense (anonyme) 259 327
162) Vocabulary: on the phone (here4u) 258 733
163) Find out a quantity (webmaster) 258 549
164) Superlative + and adjective (anonyme) 257 211
165) Articles : a / an / the / Ø (anonyme) 256 994
166) Comparative and superlative (anonyme) 255 313
167) Numbers 1/100 (anonyme) 253 653
168) Modal can (video) (anonyme) 252 992
169) Comparatives (anonyme) 248 362
170) Relatives pronouns (who, which, that...) (anonyme) 247 844
171) Vocabulary: at the restaurant (here4u) 245 655
172) A few, a little, few, little (anonyme) 245 343
173) Would rather / would prefer to (anonyme) 244 254
174) Present continuous and the Going to form (anonyme) 242 609
175) Should/ have to/ must (anonyme) 239 994
176) Have something done (anonyme) 239 834
177) The past (webmaster) 237 800
178) Used to/would (woodyrun) 237 641
179) Future continuous and future perfect. (felin) 237 609
180) How to ask a question in English (bridg) 235 431
181) I wish, if only (felin) 234 081
182) Pluperfect (webmaster) 233 926
183) Countable or Uncountable? (webmaster) 233 143
184) Some / any (younes91) 232 832
185) Should / shouldn't (anonyme) 231 530
186) Present simple or continuous (bridg) 230 799
187) Adjectives - ing and ed (felin) 229 037
188) Hypothesis (webmaster) 228 123
189) Auxiliary BE (anonyme) 226 434
190) Articles a/an/the/0 (bridg) 226 278
191) Article The or nothing (anonyme) 225 931
192) Must or mustn't (laure95) 225 621
193) Present perfect with Ever - never - (anonyme) 225 519
194) Present continuous OR Present simple? (bridg) 225 392
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 823
196) To / in order to / so as to / so that (irish21) 220 175
197) Present perfect (bridg) 219 497
198) Comparison (komiks) 218 750
199) What time is it ? (anonyme) 217 642
200) Indirect speech (bridg) 216 617
