Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 782 281
2) Placement test : grammar for beginners (anonyme) 5 999 008
3) A/AN (webmaster) 5 369 439
4) Auxiliary BE (webmaster) 3 226 305
5) Present continuous (webmaster) 3 002 018
6) Present simple (webmaster) 2 922 346
7) Present simple (webmaster) 2 599 909
8) Present continuous (webmaster) 2 438 890
9) Adjectives (webmaster) 2 094 879
10) A/an (anonyme) 2 017 676
11) Present perfect simple (webmaster) 1 648 156
12) Preterite (webmaster) 1 634 310
13) Vocabulary - Placement test (bridg) 1 620 426
14) Preterite (webmaster) 1 451 283
15) Short placement test (webmaster) 1 444 603
16) To be (bridg) 1 407 517
17) What time is it? (webmaster) 1 350 695
18) Present perfect (webmaster) 1 350 137
19) The alphabet in English (webmaster) 1 322 318
20) Adjectives (anonyme) 1 217 182
21) What time is it? (webmaster) 1 210 767
22) Numbers (webmaster) 1 189 329
23) 'A' ou 'An' (anonyme) 1 177 230
24) Two presents: present continuous, present simple (webmaster) 1 150 938
25) To be (bridg) 1 146 597
26) Comparatives / Superlatives (webmaster) 1 108 285
27) Numbers (webmaster) 1 071 906
28) CAN / MUST (webmaster) 1 059 593
29) THE/ A / AN / nothing (webmaster) 1 035 738
30) Comparatives (webmaster) 1 008 130
31) Family life (bridg) 1 001 896
32) Numbers > 100 (webmaster) 987 311
33) Future (going to/will/present continuous) (anonyme) 965 827
34) Plural (webmaster) 956 738
35) Superlatives (webmaster) 876 170
36) Adjectives (anonyme) 875 688
37) Simple present (bridg) 855 100
38) Spelled words N°1 (bridg) 851 095
39) Placement test beginners: Check your spelling (anonyme) 830 608
40) Introducing oneself (webmaster) 827 777
41) Adverbs of frequency (anonyme) 818 952
42) Family (bridg) 785 623
43) General test-End of high school / Beginning of university (webmaster) 783 728
44) Present simple (anonyme) 782 871
45) Frequency adverbs (webmaster) 778 512
46) Present BE + Ving (bridg) 766 492
47) Passive form (anonyme) 728 126
48) Genitive (webmaster) 724 332
49) Family tree (anonyme) 720 137
50) Preterite: simple or continuous? (webmaster) 717 837
51) Placement test (beginners) (lili73) 702 278
52) Past simple or present perfect (anonyme) 696 430
53) Future (webmaster) 676 566
54) Present perfect simple (bridg) 663 573
55) 2 Preterites (webmaster) 663 317
56) Preterite (webmaster) 622 187
57) List of 200 irregular verbs and audio (bridg) 617 097
58) Modals (webmaster) 613 331
59) Spelled words N°2 (bridg) 609 922
60) Modals (webmaster) 607 355
61) Height (webmaster) 606 833
62) Articles a / an / the (anonyme) 596 779
63) Plural forms (bridg) 578 332
64) Nationalities (webmaster) 574 865
65) Past continuous / Past simple (anonyme) 568 626
66) Irregular plurals (bridg) 554 397
67) Two presents: simple and continuous (webmaster) 550 355
68) Preterite (bridg) 549 813
69) Superlatives (frapedur) 541 113
70) Vocabulary: greeting people (here4u) 536 564
71) Give your opinion (bridg) 532 663
72) Adverbs of Frequency (bridg) 517 567
73) Present simple or continuous (anonyme) 512 874
74) Present perfect / preterite ? (anonyme) 511 596
75) Possessive case (anonyme) 481 238
76) Countries & nationalities (bridg) 474 117
77) Past tenses (bridg) 471 812
78) 'The' or nothing? (webmaster) 471 704
79) Introducing oneself (easy) (webmaster) 471 141
80) Passive voice (webmaster) 464 468
81) Present Simple vs. Past Simple (anonyme) 459 594
82) Questions : how to ask them (anonyme) 448 966
83) General Test II / End of high school / Beginning of universi (webmaster) 446 660
84) IN, ON, AT or TO? (webmaster) 446 020
85) Relative pronouns (webmaster) 445 536
86) Comparative of superiority (anonyme) 440 021
87) How to pronounce the final -ED? (past simple) (webmaster) 439 020
88) Relative clauses (webmaster) 423 977
89) Sounds: [h] (webmaster) 419 872
90) Comparative (anonyme) 414 976
91) A/an/Ø (bridg) 399 462
92) Past simple (anonyme) 399 440
93) Future simple (anonyme) 397 325
94) This / That / These / Those (webmaster) 393 000
95) Conditional (webmaster) 392 388
96) Passive voice (anonyme) 391 391
97) Comparing (webmaster) 388 416
98) Can / could/ may/ might (woodyrun) 380 381
99) Present perfect or past tense (anonyme) 378 694
100) Much, many, little and few (felin) 373 956
101) Personal pronouns (anonyme) 371 562
102) Preterite continuous (BE + -ING) (webmaster) 370 473
103) Genitive case (bridg) 368 717
104) Some, any, no, enough, too/too much/too many (webmaster) 368 550
105) Confusing words - Placement test (bridg) 364 867
106) Irregular verbs (webmaster) 364 269
107) Numbers from 1 to 10 (anonyme) 361 886
108) Past perfect simple, past perfect continuous (anonyme) 361 148
109) Present continuous or present simple (webmaster) 359 967
110) Present perfect or preterite? (anonyme) 358 243
111) Simple Past : regular verbs (anonyme) 354 182
112) Comparative Adjectives (bridg) 352 624
113) Who, Whom, Which, or Whose? (anonyme) 349 513
114) Past simple (video) (anonyme) 349 140
115) Past simple or past continuous (anonyme) 344 676
116) While / When (anonyme) 340 177
117) What time is it? (webmaster) 338 431
118) Modals (tinou) 336 982
119) Modal: may/might (anonyme) 334 543
120) Cardinal and ordinal numbers (anonyme) 329 070
121) The superlative (anonyme) 327 102
122) Possessive adjectives and pronouns (woodyrun) 324 836
123) How to talk about the weather (lili73) 320 945
124) Since and for (anonyme) 319 437
125) Flags (webmaster) 317 930
126) Irregular verbs (bridg) 316 485
127) Pronouns (woodyrun) 314 988
128) Prepositions - in, on, at (anonyme) 314 438
129) Tenses (anonyme) 312 674
130) Placement test 3 (webmaster) 310 837
131) Order of adjectives (webmaster) 306 926
132) Could/Couldn't (laure95) 306 496
133) Comparative (anonyme) 305 093
134) Adjectives and prepositions (anonyme) 304 427
135) Agreement Tags (webmaster) 304 368
136) Asking questions (webmaster) 303 547
137) Present perfect OR simple past? (bridg) 298 710
138) Questions in the past tense (anonyme) 298 079
139) Uncountable nouns (webmaster) 296 323
140) Superlative Adjectives (bridg) 296 193
141) Object pronouns (bridg) 295 863
142) Placement test 1 (anonyme) 293 165
143) Passive form (anonyme) 292 813
144) Present simple (anonyme) 291 837
145) Can/Must/Should (laure95) 290 861
146) Prefer/rather (bridg) 289 892
147) Past perfect (lili73) 289 666
148) Must or Have to? (woodyrun) 288 091
149) The/an/nothing (bridg) 285 661
150) To be (anonyme) 283 607
151) Can and can't (laure95) 282 446
152) Vocabulary: asking and answering (here4u) 280 486
153) Modal verbs (bridg) 277 562
154) Some / Any / no... (bridg) 274 612
155) Days of the week (bridg) 269 170
156) So / neither (anonyme) 264 545
157) Past simple (video) (anonyme) 264 005
158) Present continuous (chnawa) 261 345
159) Used to (bridg) 260 515
160) Should / must (anonyme) 260 071
161) Past tense (anonyme) 259 625
162) Vocabulary: on the phone (here4u) 258 805
163) Find out a quantity (webmaster) 258 707
164) Articles : a / an / the / Ø (anonyme) 257 940
165) Superlative + and adjective (anonyme) 257 663
166) Comparative and superlative (anonyme) 256 540
167) Numbers 1/100 (anonyme) 253 871
168) Modal can (video) (anonyme) 253 244
169) Comparatives (anonyme) 250 111
170) Relatives pronouns (who, which, that...) (anonyme) 247 875
171) A few, a little, few, little (anonyme) 246 142
172) Vocabulary: at the restaurant (here4u) 245 699
173) Would rather / would prefer to (anonyme) 244 675
174) Present continuous and the Going to form (anonyme) 243 132
175) Should/ have to/ must (anonyme) 240 764
176) Have something done (anonyme) 240 062
177) Used to/would (woodyrun) 238 072
178) The past (webmaster) 237 957
179) Future continuous and future perfect. (felin) 237 938
180) How to ask a question in English (bridg) 235 884
181) Pluperfect (webmaster) 234 321
182) I wish, if only (felin) 234 284
183) Countable or Uncountable? (webmaster) 233 597
184) Some / any (younes91) 233 557
185) Should / shouldn't (anonyme) 231 830
186) Present simple or continuous (bridg) 230 813
187) Adjectives - ing and ed (felin) 229 384
188) Hypothesis (webmaster) 228 505
189) Auxiliary BE (anonyme) 226 572
190) Articles a/an/the/0 (bridg) 226 428
191) Must or mustn't (laure95) 226 378
192) Article The or nothing (anonyme) 226 207
193) Present perfect with Ever - never - (anonyme) 226 047
194) Present continuous OR Present simple? (bridg) 225 649
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 223 072
196) To / in order to / so as to / so that (irish21) 220 876
197) Comparison (komiks) 220 236
198) Present perfect (bridg) 219 695
199) What time is it ? (anonyme) 217 831
200) Indirect speech (bridg) 217 364
