Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 778 452
2) Placement test : grammar for beginners (anonyme) 5 992 126
3) A/AN (webmaster) 5 365 213
4) Auxiliary BE (webmaster) 3 224 314
5) Present continuous (webmaster) 2 999 228
6) Present simple (webmaster) 2 914 870
7) Present simple (webmaster) 2 597 570
8) Present continuous (webmaster) 2 434 700
9) Adjectives (webmaster) 2 093 614
10) A/an (anonyme) 2 015 377
11) Present perfect simple (webmaster) 1 643 719
12) Preterite (webmaster) 1 628 503
13) Vocabulary - Placement test (bridg) 1 619 189
14) Preterite (webmaster) 1 447 726
15) Short placement test (webmaster) 1 443 584
16) To be (bridg) 1 406 253
17) What time is it? (webmaster) 1 349 387
18) Present perfect (webmaster) 1 346 266
19) The alphabet in English (webmaster) 1 321 131
20) Adjectives (anonyme) 1 215 929
21) What time is it? (webmaster) 1 208 496
22) Numbers (webmaster) 1 188 582
23) 'A' ou 'An' (anonyme) 1 175 573
24) Two presents: present continuous, present simple (webmaster) 1 149 420
25) To be (bridg) 1 145 594
26) Comparatives / Superlatives (webmaster) 1 104 466
27) Numbers (webmaster) 1 070 837
28) CAN / MUST (webmaster) 1 058 694
29) THE/ A / AN / nothing (webmaster) 1 033 741
30) Comparatives (webmaster) 1 007 232
31) Family life (bridg) 1 000 850
32) Numbers > 100 (webmaster) 986 333
33) Future (going to/will/present continuous) (anonyme) 964 097
34) Plural (webmaster) 955 771
35) Superlatives (webmaster) 875 294
36) Adjectives (anonyme) 874 820
37) Simple present (bridg) 854 010
38) Spelled words N°1 (bridg) 850 203
39) Placement test beginners: Check your spelling (anonyme) 830 091
40) Introducing oneself (webmaster) 827 209
41) Adverbs of frequency (anonyme) 817 552
42) Family (bridg) 784 813
43) General test-End of high school / Beginning of university (webmaster) 782 893
44) Present simple (anonyme) 780 659
45) Frequency adverbs (webmaster) 777 788
46) Present BE + Ving (bridg) 765 146
47) Genitive (webmaster) 723 678
48) Passive form (anonyme) 722 406
49) Family tree (anonyme) 719 426
50) Preterite: simple or continuous? (webmaster) 716 733
51) Placement test (beginners) (lili73) 701 138
52) Past simple or present perfect (anonyme) 694 208
53) Future (webmaster) 675 964
54) 2 Preterites (webmaster) 662 090
55) Present perfect simple (bridg) 661 284
56) Preterite (webmaster) 620 467
57) List of 200 irregular verbs and audio (bridg) 616 076
58) Modals (webmaster) 612 722
59) Spelled words N°2 (bridg) 609 216
60) Height (webmaster) 606 328
61) Modals (webmaster) 605 556
62) Articles a / an / the (anonyme) 596 759
63) Plural forms (bridg) 577 501
64) Nationalities (webmaster) 574 284
65) Past continuous / Past simple (anonyme) 566 493
66) Irregular plurals (bridg) 553 646
67) Two presents: simple and continuous (webmaster) 549 642
68) Preterite (bridg) 549 071
69) Superlatives (frapedur) 538 974
70) Vocabulary: greeting people (here4u) 536 466
71) Give your opinion (bridg) 531 988
72) Adverbs of Frequency (bridg) 516 974
73) Present simple or continuous (anonyme) 511 209
74) Present perfect / preterite ? (anonyme) 509 673
75) Possessive case (anonyme) 480 665
76) Countries & nationalities (bridg) 473 503
77) 'The' or nothing? (webmaster) 471 246
78) Past tenses (bridg) 470 872
79) Introducing oneself (easy) (webmaster) 470 741
80) Passive voice (webmaster) 463 491
81) Present Simple vs. Past Simple (anonyme) 457 273
82) Questions : how to ask them (anonyme) 448 420
83) General Test II / End of high school / Beginning of universi (webmaster) 446 175
84) IN, ON, AT or TO? (webmaster) 445 253
85) Relative pronouns (webmaster) 444 485
86) Comparative of superiority (anonyme) 438 691
87) How to pronounce the final -ED? (past simple) (webmaster) 437 850
88) Relative clauses (webmaster) 423 294
89) Sounds: [h] (webmaster) 419 521
90) Comparative (anonyme) 413 704
91) A/an/Ø (bridg) 398 830
92) Past simple (anonyme) 397 336
93) Future simple (anonyme) 396 409
94) This / That / These / Those (webmaster) 392 547
95) Conditional (webmaster) 391 671
96) Passive voice (anonyme) 390 622
97) Comparing (webmaster) 388 031
98) Can / could/ may/ might (woodyrun) 379 507
99) Present perfect or past tense (anonyme) 377 483
100) Much, many, little and few (felin) 372 826
101) Personal pronouns (anonyme) 371 293
102) Preterite continuous (BE + -ING) (webmaster) 369 293
103) Some, any, no, enough, too/too much/too many (webmaster) 368 107
104) Genitive case (bridg) 368 078
105) Confusing words - Placement test (bridg) 364 532
106) Irregular verbs (webmaster) 363 601
107) Numbers from 1 to 10 (anonyme) 361 533
108) Past perfect simple, past perfect continuous (anonyme) 360 919
109) Present continuous or present simple (webmaster) 359 571
110) Present perfect or preterite? (anonyme) 356 844
111) Simple Past : regular verbs (anonyme) 353 075
112) Comparative Adjectives (bridg) 352 236
113) Who, Whom, Which, or Whose? (anonyme) 348 815
114) Past simple (video) (anonyme) 348 371
115) Past simple or past continuous (anonyme) 342 729
116) While / When (anonyme) 338 813
117) What time is it? (webmaster) 337 890
118) Modals (tinou) 336 560
119) Modal: may/might (anonyme) 334 219
120) Cardinal and ordinal numbers (anonyme) 328 734
121) The superlative (anonyme) 325 554
122) Possessive adjectives and pronouns (woodyrun) 324 210
123) How to talk about the weather (lili73) 320 885
124) Since and for (anonyme) 318 849
125) Flags (webmaster) 317 591
126) Irregular verbs (bridg) 316 011
127) Prepositions - in, on, at (anonyme) 314 124
128) Pronouns (woodyrun) 313 666
129) Tenses (anonyme) 311 942
130) Placement test 3 (webmaster) 310 460
131) Order of adjectives (webmaster) 306 577
132) Could/Couldn't (laure95) 305 847
133) Comparative (anonyme) 304 602
134) Agreement Tags (webmaster) 304 040
135) Adjectives and prepositions (anonyme) 304 033
136) Asking questions (webmaster) 303 098
137) Present perfect OR simple past? (bridg) 298 364
138) Questions in the past tense (anonyme) 297 557
139) Superlative Adjectives (bridg) 295 815
140) Uncountable nouns (webmaster) 295 634
141) Object pronouns (bridg) 294 956
142) Placement test 1 (anonyme) 292 795
143) Passive form (anonyme) 291 268
144) Present simple (anonyme) 291 252
145) Prefer/rather (bridg) 289 395
146) Can/Must/Should (laure95) 289 318
147) Past perfect (lili73) 288 211
148) Must or Have to? (woodyrun) 287 499
149) The/an/nothing (bridg) 285 242
150) To be (anonyme) 283 480
151) Can and can't (laure95) 281 572
152) Vocabulary: asking and answering (here4u) 280 442
153) Modal verbs (bridg) 277 264
154) Some / Any / no... (bridg) 270 475
155) Days of the week (bridg) 269 106
156) So / neither (anonyme) 264 361
157) Past simple (video) (anonyme) 263 718
158) Used to (bridg) 260 365
159) Present continuous (chnawa) 260 094
160) Should / must (anonyme) 259 551
161) Past tense (anonyme) 259 309
162) Vocabulary: on the phone (here4u) 258 729
163) Find out a quantity (webmaster) 258 545
164) Superlative + and adjective (anonyme) 257 194
165) Articles : a / an / the / Ø (anonyme) 256 931
166) Comparative and superlative (anonyme) 255 269
167) Numbers 1/100 (anonyme) 253 640
168) Modal can (video) (anonyme) 252 984
169) Comparatives (anonyme) 248 250
170) Relatives pronouns (who, which, that...) (anonyme) 247 840
171) Vocabulary: at the restaurant (here4u) 245 654
172) A few, a little, few, little (anonyme) 245 292
173) Would rather / would prefer to (anonyme) 244 243
174) Present continuous and the Going to form (anonyme) 242 597
175) Should/ have to/ must (anonyme) 239 975
176) Have something done (anonyme) 239 825
177) The past (webmaster) 237 791
178) Used to/would (woodyrun) 237 613
179) Future continuous and future perfect. (felin) 237 603
180) How to ask a question in English (bridg) 235 418
181) I wish, if only (felin) 234 072
182) Pluperfect (webmaster) 233 919
183) Countable or Uncountable? (webmaster) 233 133
184) Some / any (younes91) 232 804
185) Should / shouldn't (anonyme) 231 516
186) Present simple or continuous (bridg) 230 799
187) Adjectives - ing and ed (felin) 229 024
188) Hypothesis (webmaster) 228 109
189) Auxiliary BE (anonyme) 226 424
190) Articles a/an/the/0 (bridg) 226 273
191) Article The or nothing (anonyme) 225 919
192) Must or mustn't (laure95) 225 580
193) Present perfect with Ever - never - (anonyme) 225 515
194) Present continuous OR Present simple? (bridg) 225 365
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 812
196) To / in order to / so as to / so that (irish21) 220 158
197) Present perfect (bridg) 219 485
198) Comparison (komiks) 218 700
199) What time is it ? (anonyme) 217 638
200) Indirect speech (bridg) 216 580
